· 10 years ago · Apr 21, 2016, 05:42 PM
1<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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3 Licensed to the Apache Software Foundation (ASF) under one or more
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6 The ASF licenses this file to You under the Apache License, Version 2.0
7 (the "License"); you may not use this file except in compliance with
8 the License. You may obtain a copy of the License at
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10 http://www.apache.org/licenses/LICENSE-2.0
11
12 Unless required by applicable law or agreed to in writing, software
13 distributed under the License is distributed on an "AS IS" BASIS,
14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 limitations under the License.
17--><configuration>
18 <!-- WARNING!!! This file is auto generated for documentation purposes ONLY! -->
19 <!-- WARNING!!! Any changes you make to this file will be ignored by Hive. -->
20 <!-- WARNING!!! You must make your changes in hive-site.xml instead. -->
21 <!-- Hive Execution Parameters -->
22 <property>
23 <name>hive.exec.script.wrapper</name>
24 <value/>
25 <description/>
26 </property>
27 <property>
28 <name>hive.exec.plan</name>
29 <value/>
30 <description/>
31 </property>
32 <property>
33 <name>hive.plan.serialization.format</name>
34 <value>kryo</value>
35 <description>
36 Query plan format serialization between client and task nodes.
37 Two supported values are : kryo and javaXML. Kryo is default.
38 </description>
39 </property>
40 <property>
41 <name>hive.exec.stagingdir</name>
42 <value>.hive-staging</value>
43 <description>Directory name that will be created inside table locations in order to support HDFS encryption. This is replaces ${hive.exec.scratchdir} for query results with the exception of read-only tables. In all cases ${hive.exec.scratchdir} is still used for other temporary files, such as job plans.</description>
44 </property>
45 <property>
46 <name>hive.exec.scratchdir</name>
47 <value>/tmp/hive-${user.name}</value>
48 <description>HDFS root scratch dir for Hive jobs which gets created with write all (733) permission. For each connecting user, an HDFS scratch dir: ${hive.exec.scratchdir}/<username> is created, with ${hive.scratch.dir.permission}.</description>
49 </property>
50 <property>
51 <name>hive.exec.local.scratchdir</name>
52 <value>/tmp/-${user.name}</value>
53 <description>Local scratch space for Hive jobs</description>
54 </property>
55 <property>
56 <name>hive.downloaded.resources.dir</name>
57 <value>/tmp/${user.name}_resources</value>
58 <description>Temporary local directory for added resources in the remote file system.</description>
59 </property>
60 <property>
61 <name>hive.scratch.dir.permission</name>
62 <value>733</value>
63 <description>The permission for the user specific scratch directories that get created.</description>
64 </property>
65 <property>
66 <name>hive.exec.submitviachild</name>
67 <value>false</value>
68 <description/>
69 </property>
70 <property>
71 <name>hive.exec.submit.local.task.via.child</name>
72 <value>true</value>
73 <description>
74 Determines whether local tasks (typically mapjoin hashtable generation phase) runs in
75 separate JVM (true recommended) or not.
76 Avoids the overhead of spawning new JVM, but can lead to out-of-memory issues.
77 </description>
78 </property>
79 <property>
80 <name>hive.exec.script.maxerrsize</name>
81 <value>100000</value>
82 <description>
83 Maximum number of bytes a script is allowed to emit to standard error (per map-reduce task).
84 This prevents runaway scripts from filling logs partitions to capacity
85 </description>
86 </property>
87 <property>
88 <name>hive.exec.script.allow.partial.consumption</name>
89 <value>false</value>
90 <description>
91 When enabled, this option allows a user script to exit successfully without consuming
92 all the data from the standard input.
93 </description>
94 </property>
95 <property>
96 <name>stream.stderr.reporter.prefix</name>
97 <value>reporter:</value>
98 <description>Streaming jobs that log to standard error with this prefix can log counter or status information.</description>
99 </property>
100 <property>
101 <name>stream.stderr.reporter.enabled</name>
102 <value>true</value>
103 <description>Enable consumption of status and counter messages for streaming jobs.</description>
104 </property>
105 <property>
106 <name>hive.exec.compress.output</name>
107 <value>false</value>
108 <description>
109 This controls whether the final outputs of a query (to a local/HDFS file or a Hive table) is compressed.
110 The compression codec and other options are determined from Hadoop config variables mapred.output.compress*
111 </description>
112 </property>
113 <property>
114 <name>hive.exec.compress.intermediate</name>
115 <value>false</value>
116 <description>
117 This controls whether intermediate files produced by Hive between multiple map-reduce jobs are compressed.
118 The compression codec and other options are determined from Hadoop config variables mapred.output.compress*
119 </description>
120 </property>
121 <property>
122 <name>hive.intermediate.compression.codec</name>
123 <value/>
124 <description/>
125 </property>
126 <property>
127 <name>hive.intermediate.compression.type</name>
128 <value/>
129 <description/>
130 </property>
131 <property>
132 <name>hive.exec.reducers.bytes.per.reducer</name>
133 <value>256000000</value>
134 <description>size per reducer.The default is 256Mb, i.e if the input size is 1G, it will use 4 reducers.</description>
135 </property>
136 <property>
137 <name>hive.exec.reducers.max</name>
138 <value>1009</value>
139 <description>
140 max number of reducers will be used. If the one specified in the configuration parameter mapred.reduce.tasks is
141 negative, Hive will use this one as the max number of reducers when automatically determine number of reducers.
142 </description>
143 </property>
144 <property>
145 <name>hive.exec.pre.hooks</name>
146 <value/>
147 <description>
148 Comma-separated list of pre-execution hooks to be invoked for each statement.
149 A pre-execution hook is specified as the name of a Java class which implements the
150 org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
151 </description>
152 </property>
153 <property>
154 <name>hive.exec.post.hooks</name>
155 <value/>
156 <description>
157 Comma-separated list of post-execution hooks to be invoked for each statement.
158 A post-execution hook is specified as the name of a Java class which implements the
159 org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
160 </description>
161 </property>
162 <property>
163 <name>hive.exec.failure.hooks</name>
164 <value/>
165 <description>
166 Comma-separated list of on-failure hooks to be invoked for each statement.
167 An on-failure hook is specified as the name of Java class which implements the
168 org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext interface.
169 </description>
170 </property>
171 <property>
172 <name>hive.exec.query.redactor.hooks</name>
173 <value/>
174 <description>
175 Comma-separated list of hooks to be invoked for each query which can
176 tranform the query before it's placed in the job.xml file. Must be a Java class which
177 extends from the org.apache.hadoop.hive.ql.hooks.Redactor abstract class.
178 </description>
179 </property>
180 <property>
181 <name>hive.client.stats.publishers</name>
182 <value/>
183 <description>
184 Comma-separated list of statistics publishers to be invoked on counters on each job.
185 A client stats publisher is specified as the name of a Java class which implements the
186 org.apache.hadoop.hive.ql.stats.ClientStatsPublisher interface.
187 </description>
188 </property>
189 <property>
190 <name>hive.exec.parallel</name>
191 <value>false</value>
192 <description>Whether to execute jobs in parallel</description>
193 </property>
194 <property>
195 <name>hive.exec.parallel.thread.number</name>
196 <value>8</value>
197 <description>How many jobs at most can be executed in parallel</description>
198 </property>
199 <property>
200 <name>hive.mapred.reduce.tasks.speculative.execution</name>
201 <value>true</value>
202 <description>Whether speculative execution for reducers should be turned on. </description>
203 </property>
204 <property>
205 <name>hive.exec.counters.pull.interval</name>
206 <value>1000</value>
207 <description>
208 The interval with which to poll the JobTracker for the counters the running job.
209 The smaller it is the more load there will be on the jobtracker, the higher it is the less granular the caught will be.
210 </description>
211 </property>
212 <property>
213 <name>hive.exec.dynamic.partition</name>
214 <value>true</value>
215 <description>Whether or not to allow dynamic partitions in DML/DDL.</description>
216 </property>
217 <property>
218 <name>hive.exec.dynamic.partition.mode</name>
219 <value>strict</value>
220 <description>
221 In strict mode, the user must specify at least one static partition
222 in case the user accidentally overwrites all partitions.
223 In nonstrict mode all partitions are allowed to be dynamic.
224 </description>
225 </property>
226 <property>
227 <name>hive.exec.max.dynamic.partitions</name>
228 <value>1000</value>
229 <description>Maximum number of dynamic partitions allowed to be created in total.</description>
230 </property>
231 <property>
232 <name>hive.exec.max.dynamic.partitions.pernode</name>
233 <value>100</value>
234 <description>Maximum number of dynamic partitions allowed to be created in each mapper/reducer node.</description>
235 </property>
236 <property>
237 <name>hive.exec.max.created.files</name>
238 <value>100000</value>
239 <description>Maximum number of HDFS files created by all mappers/reducers in a MapReduce job.</description>
240 </property>
241 <property>
242 <name>hive.exec.default.partition.name</name>
243 <value>__HIVE_DEFAULT_PARTITION__</value>
244 <description>
245 The default partition name in case the dynamic partition column value is null/empty string or any other values that cannot be escaped.
246 This value must not contain any special character used in HDFS URI (e.g., ':', '%', '/' etc).
247 The user has to be aware that the dynamic partition value should not contain this value to avoid confusions.
248 </description>
249 </property>
250 <property>
251 <name>hive.lockmgr.zookeeper.default.partition.name</name>
252 <value>__HIVE_DEFAULT_ZOOKEEPER_PARTITION__</value>
253 <description/>
254 </property>
255 <property>
256 <name>hive.exec.show.job.failure.debug.info</name>
257 <value>true</value>
258 <description>
259 If a job fails, whether to provide a link in the CLI to the task with the
260 most failures, along with debugging hints if applicable.
261 </description>
262 </property>
263 <property>
264 <name>hive.exec.job.debug.capture.stacktraces</name>
265 <value>true</value>
266 <description>
267 Whether or not stack traces parsed from the task logs of a sampled failed task
268 for each failed job should be stored in the SessionState
269 </description>
270 </property>
271 <property>
272 <name>hive.exec.job.debug.timeout</name>
273 <value>30000</value>
274 <description/>
275 </property>
276 <property>
277 <name>hive.exec.tasklog.debug.timeout</name>
278 <value>20000</value>
279 <description/>
280 </property>
281 <property>
282 <name>hive.output.file.extension</name>
283 <value/>
284 <description>
285 String used as a file extension for output files.
286 If not set, defaults to the codec extension for text files (e.g. ".gz"), or no extension otherwise.
287 </description>
288 </property>
289 <property>
290 <name>hive.exec.mode.local.auto</name>
291 <value>false</value>
292 <description>Let Hive determine whether to run in local mode automatically</description>
293 </property>
294 <property>
295 <name>hive.exec.mode.local.auto.inputbytes.max</name>
296 <value>134217728</value>
297 <description>When hive.exec.mode.local.auto is true, input bytes should less than this for local mode.</description>
298 </property>
299 <property>
300 <name>hive.exec.mode.local.auto.input.files.max</name>
301 <value>4</value>
302 <description>When hive.exec.mode.local.auto is true, the number of tasks should less than this for local mode.</description>
303 </property>
304 <property>
305 <name>hive.exec.drop.ignorenonexistent</name>
306 <value>true</value>
307 <description>Do not report an error if DROP TABLE/VIEW/Index/Function specifies a non-existent table/view/index/function</description>
308 </property>
309 <property>
310 <name>hive.ignore.mapjoin.hint</name>
311 <value>true</value>
312 <description>Ignore the mapjoin hint</description>
313 </property>
314 <property>
315 <name>hive.file.max.footer</name>
316 <value>100</value>
317 <description>maximum number of lines for footer user can define for a table file</description>
318 </property>
319 <property>
320 <name>hive.resultset.use.unique.column.names</name>
321 <value>true</value>
322 <description>
323 Make column names unique in the result set by qualifying column names with table alias if needed.
324 Table alias will be added to column names for queries of type "select *" or
325 if query explicitly uses table alias "select r1.x..".
326 </description>
327 </property>
328 <property>
329 <name>fs.har.impl</name>
330 <value>org.apache.hadoop.hive.shims.HiveHarFileSystem</value>
331 <description>The implementation for accessing Hadoop Archives. Note that this won't be applicable to Hadoop versions less than 0.20</description>
332 </property>
333 <property>
334 <name>hive.metastore.warehouse.dir</name>
335 <value>/user/hive/warehouse</value>
336 <description>location of default database for the warehouse</description>
337 </property>
338 <property>
339 <name>hive.metastore.uris</name>
340 <value/>
341 <description>Thrift URI for the remote metastore. Used by metastore client to connect to remote metastore.</description>
342 </property>
343 <property>
344 <name>hive.metastore.connect.retries</name>
345 <value>3</value>
346 <description>Number of retries while opening a connection to metastore</description>
347 </property>
348 <property>
349 <name>hive.metastore.failure.retries</name>
350 <value>1</value>
351 <description>Number of retries upon failure of Thrift metastore calls</description>
352 </property>
353 <property>
354 <name>hive.metastore.client.connect.retry.delay</name>
355 <value>1s</value>
356 <description>
357 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
358 Number of seconds for the client to wait between consecutive connection attempts
359 </description>
360 </property>
361 <property>
362 <name>hive.metastore.client.socket.timeout</name>
363 <value>600s</value>
364 <description>
365 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
366 MetaStore Client socket timeout in seconds
367 </description>
368 </property>
369 <property>
370 <name>hive.metastore.client.socket.lifetime</name>
371 <value>0s</value>
372 <description>
373 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
374 MetaStore Client socket lifetime in seconds. After this time is exceeded, client
375 reconnects on the next MetaStore operation. A value of 0s means the connection
376 has an infinite lifetime.
377 </description>
378 </property>
379 <property>
380 <name>javax.jdo.option.ConnectionPassword</name>
381 <value>mine</value>
382 <description>password to use against metastore database</description>
383 </property>
384 <property>
385 <name>hive.metastore.ds.connection.url.hook</name>
386 <value/>
387 <description>Name of the hook to use for retrieving the JDO connection URL. If empty, the value in javax.jdo.option.ConnectionURL is used</description>
388 </property>
389 <property>
390 <name>javax.jdo.option.Multithreaded</name>
391 <value>true</value>
392 <description>Set this to true if multiple threads access metastore through JDO concurrently.</description>
393 </property>
394 <property>
395 <name>javax.jdo.option.ConnectionURL</name>
396 <value>jdbc:derby:;databaseName=metastore_db;create=false</value>
397 <description>JDBC connect string for a JDBC metastore</description>
398 </property>
399 <property>
400 <name>hive.hmshandler.retry.attempts</name>
401 <value>10</value>
402 <description>The number of times to retry a HMSHandler call if there were a connection error.</description>
403 </property>
404 <property>
405 <name>hive.hmshandler.retry.interval</name>
406 <value>2000ms</value>
407 <description>
408 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
409 The time between HMSHandler retry attempts on failure.
410 </description>
411 </property>
412 <property>
413 <name>hive.hmshandler.force.reload.conf</name>
414 <value>false</value>
415 <description>
416 Whether to force reloading of the HMSHandler configuration (including
417 the connection URL, before the next metastore query that accesses the
418 datastore. Once reloaded, this value is reset to false. Used for
419 testing only.
420 </description>
421 </property>
422 <property>
423 <name>hive.metastore.server.max.message.size</name>
424 <value>104857600</value>
425 <description>Maximum message size in bytes a HMS will accept.</description>
426 </property>
427 <property>
428 <name>hive.metastore.server.min.threads</name>
429 <value>200</value>
430 <description>Minimum number of worker threads in the Thrift server's pool.</description>
431 </property>
432 <property>
433 <name>hive.metastore.server.max.threads</name>
434 <value>1000</value>
435 <description>Maximum number of worker threads in the Thrift server's pool.</description>
436 </property>
437 <property>
438 <name>hive.metastore.server.tcp.keepalive</name>
439 <value>true</value>
440 <description>Whether to enable TCP keepalive for the metastore server. Keepalive will prevent accumulation of half-open connections.</description>
441 </property>
442 <property>
443 <name>hive.metastore.archive.intermediate.original</name>
444 <value>_INTERMEDIATE_ORIGINAL</value>
445 <description>
446 Intermediate dir suffixes used for archiving. Not important what they
447 are, as long as collisions are avoided
448 </description>
449 </property>
450 <property>
451 <name>hive.metastore.archive.intermediate.archived</name>
452 <value>_INTERMEDIATE_ARCHIVED</value>
453 <description/>
454 </property>
455 <property>
456 <name>hive.metastore.archive.intermediate.extracted</name>
457 <value>_INTERMEDIATE_EXTRACTED</value>
458 <description/>
459 </property>
460 <property>
461 <name>hive.metastore.kerberos.keytab.file</name>
462 <value/>
463 <description>The path to the Kerberos Keytab file containing the metastore Thrift server's service principal.</description>
464 </property>
465 <property>
466 <name>hive.metastore.kerberos.principal</name>
467 <value>hive-metastore/_HOST@EXAMPLE.COM</value>
468 <description>
469 The service principal for the metastore Thrift server.
470 The special string _HOST will be replaced automatically with the correct host name.
471 </description>
472 </property>
473 <property>
474 <name>hive.metastore.sasl.enabled</name>
475 <value>false</value>
476 <description>If true, the metastore Thrift interface will be secured with SASL. Clients must authenticate with Kerberos.</description>
477 </property>
478 <property>
479 <name>hive.metastore.thrift.framed.transport.enabled</name>
480 <value>false</value>
481 <description>If true, the metastore Thrift interface will use TFramedTransport. When false (default) a standard TTransport is used.</description>
482 </property>
483 <property>
484 <name>hive.metastore.thrift.compact.protocol.enabled</name>
485 <value>false</value>
486 <description>
487 If true, the metastore Thrift interface will use TCompactProtocol. When false (default) TBinaryProtocol will be used.
488 Setting it to true will break compatibility with older clients running TBinaryProtocol.
489 </description>
490 </property>
491 <property>
492 <name>hive.cluster.delegation.token.store.class</name>
493 <value>org.apache.hadoop.hive.thrift.MemoryTokenStore</value>
494 <description>The delegation token store implementation. Set to org.apache.hadoop.hive.thrift.ZooKeeperTokenStore for load-balanced cluster.</description>
495 </property>
496 <property>
497 <name>hive.cluster.delegation.token.store.zookeeper.connectString</name>
498 <value/>
499 <description>
500 The ZooKeeper token store connect string. You can re-use the configuration value
501 set in hive.zookeeper.quorum, by leaving this parameter unset.
502 </description>
503 </property>
504 <property>
505 <name>hive.cluster.delegation.token.store.zookeeper.znode</name>
506 <value>/hivedelegation</value>
507 <description>
508 The root path for token store data. Note that this is used by both HiveServer2 and
509 MetaStore to store delegation Token. One directory gets created for each of them.
510 The final directory names would have the servername appended to it (HIVESERVER2,
511 METASTORE).
512 </description>
513 </property>
514 <property>
515 <name>hive.cluster.delegation.token.store.zookeeper.acl</name>
516 <value/>
517 <description>
518 ACL for token store entries. Comma separated list of ACL entries. For example:
519 sasl:hive/host1@MY.DOMAIN:cdrwa,sasl:hive/host2@MY.DOMAIN:cdrwa
520 Defaults to all permissions for the hiveserver2/metastore process user.
521 </description>
522 </property>
523 <property>
524 <name>hive.metastore.cache.pinobjtypes</name>
525 <value>Table,StorageDescriptor,SerDeInfo,Partition,Database,Type,FieldSchema,Order</value>
526 <description>List of comma separated metastore object types that should be pinned in the cache</description>
527 </property>
528 <property>
529 <name>datanucleus.connectionPoolingType</name>
530 <value>BONECP</value>
531 <description>Specify connection pool library for datanucleus</description>
532 </property>
533 <property>
534 <name>datanucleus.validateTables</name>
535 <value>false</value>
536 <description>validates existing schema against code. turn this on if you want to verify existing schema</description>
537 </property>
538 <property>
539 <name>datanucleus.validateColumns</name>
540 <value>false</value>
541 <description>validates existing schema against code. turn this on if you want to verify existing schema</description>
542 </property>
543 <property>
544 <name>datanucleus.validateConstraints</name>
545 <value>false</value>
546 <description>validates existing schema against code. turn this on if you want to verify existing schema</description>
547 </property>
548 <property>
549 <name>datanucleus.storeManagerType</name>
550 <value>rdbms</value>
551 <description>metadata store type</description>
552 </property>
553 <property>
554 <name>datanucleus.autoCreateSchema</name>
555 <value>true</value>
556 <description>creates necessary schema on a startup if one doesn't exist. set this to false, after creating it once</description>
557 </property>
558 <property>
559 <name>datanucleus.fixedDatastore</name>
560 <value>false</value>
561 <description/>
562 </property>
563 <property>
564 <name>hive.metastore.schema.verification</name>
565 <value>false</value>
566 <description>
567 Enforce metastore schema version consistency.
568 True: Verify that version information stored in metastore matches with one from Hive jars. Also disable automatic
569 schema migration attempt. Users are required to manually migrate schema after Hive upgrade which ensures
570 proper metastore schema migration. (Default)
571 False: Warn if the version information stored in metastore doesn't match with one from in Hive jars.
572 </description>
573 </property>
574 <property>
575 <name>hive.metastore.schema.verification.record.version</name>
576 <value>true</value>
577 <description>
578 When true the current MS version is recorded in the VERSION table. If this is disabled and verification is
579 enabled the MS will be unusable.
580 </description>
581 </property>
582 <property>
583 <name>datanucleus.autoStartMechanismMode</name>
584 <value>checked</value>
585 <description>throw exception if metadata tables are incorrect</description>
586 </property>
587 <property>
588 <name>datanucleus.transactionIsolation</name>
589 <value>read-committed</value>
590 <description>Default transaction isolation level for identity generation.</description>
591 </property>
592 <property>
593 <name>datanucleus.cache.level2</name>
594 <value>false</value>
595 <description>Use a level 2 cache. Turn this off if metadata is changed independently of Hive metastore server</description>
596 </property>
597 <property>
598 <name>datanucleus.cache.level2.type</name>
599 <value>none</value>
600 <description/>
601 </property>
602 <property>
603 <name>datanucleus.identifierFactory</name>
604 <value>datanucleus1</value>
605 <description>
606 Name of the identifier factory to use when generating table/column names etc.
607 'datanucleus1' is used for backward compatibility with DataNucleus v1
608 </description>
609 </property>
610 <property>
611 <name>datanucleus.rdbms.useLegacyNativeValueStrategy</name>
612 <value>true</value>
613 <description/>
614 </property>
615 <property>
616 <name>datanucleus.plugin.pluginRegistryBundleCheck</name>
617 <value>LOG</value>
618 <description>Defines what happens when plugin bundles are found and are duplicated [EXCEPTION|LOG|NONE]</description>
619 </property>
620 <property>
621 <name>hive.metastore.batch.retrieve.max</name>
622 <value>300</value>
623 <description>
624 Maximum number of objects (tables/partitions) can be retrieved from metastore in one batch.
625 The higher the number, the less the number of round trips is needed to the Hive metastore server,
626 but it may also cause higher memory requirement at the client side.
627 </description>
628 </property>
629 <property>
630 <name>hive.metastore.batch.retrieve.table.partition.max</name>
631 <value>1000</value>
632 <description>Maximum number of table partitions that metastore internally retrieves in one batch.</description>
633 </property>
634 <property>
635 <name>hive.metastore.init.hooks</name>
636 <value/>
637 <description>
638 A comma separated list of hooks to be invoked at the beginning of HMSHandler initialization.
639 An init hook is specified as the name of Java class which extends org.apache.hadoop.hive.metastore.MetaStoreInitListener.
640 </description>
641 </property>
642 <property>
643 <name>hive.metastore.pre.event.listeners</name>
644 <value/>
645 <description>List of comma separated listeners for metastore events.</description>
646 </property>
647 <property>
648 <name>hive.metastore.event.listeners</name>
649 <value/>
650 <description/>
651 </property>
652 <property>
653 <name>hive.metastore.event.db.listener.timetolive</name>
654 <value>86400s</value>
655 <description>
656 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
657 time after which events will be removed from the database listener queue
658 </description>
659 </property>
660 <property>
661 <name>hive.metastore.authorization.storage.checks</name>
662 <value>false</value>
663 <description>
664 Should the metastore do authorization checks against the underlying storage (usually hdfs)
665 for operations like drop-partition (disallow the drop-partition if the user in
666 question doesn't have permissions to delete the corresponding directory
667 on the storage).
668 </description>
669 </property>
670 <property>
671 <name>hive.metastore.event.clean.freq</name>
672 <value>0s</value>
673 <description>
674 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
675 Frequency at which timer task runs to purge expired events in metastore.
676 </description>
677 </property>
678 <property>
679 <name>hive.metastore.event.expiry.duration</name>
680 <value>0s</value>
681 <description>
682 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
683 Duration after which events expire from events table
684 </description>
685 </property>
686 <property>
687 <name>hive.metastore.execute.setugi</name>
688 <value>true</value>
689 <description>
690 In unsecure mode, setting this property to true will cause the metastore to execute DFS operations using
691 the client's reported user and group permissions. Note that this property must be set on
692 both the client and server sides. Further note that its best effort.
693 If client sets its to true and server sets it to false, client setting will be ignored.
694 </description>
695 </property>
696 <property>
697 <name>hive.metastore.partition.name.whitelist.pattern</name>
698 <value/>
699 <description>Partition names will be checked against this regex pattern and rejected if not matched.</description>
700 </property>
701 <property>
702 <name>hive.metastore.integral.jdo.pushdown</name>
703 <value>false</value>
704 <description>
705 Allow JDO query pushdown for integral partition columns in metastore. Off by default. This
706 improves metastore perf for integral columns, especially if there's a large number of partitions.
707 However, it doesn't work correctly with integral values that are not normalized (e.g. have
708 leading zeroes, like 0012). If metastore direct SQL is enabled and works, this optimization
709 is also irrelevant.
710 </description>
711 </property>
712 <property>
713 <name>hive.metastore.try.direct.sql</name>
714 <value>true</value>
715 <description>
716 Whether the Hive metastore should try to use direct SQL queries instead of the
717 DataNucleus for certain read paths. This can improve metastore performance when
718 fetching many partitions or column statistics by orders of magnitude; however, it
719 is not guaranteed to work on all RDBMS-es and all versions. In case of SQL failures,
720 the metastore will fall back to the DataNucleus, so it's safe even if SQL doesn't
721 work for all queries on your datastore. If all SQL queries fail (for example, your
722 metastore is backed by MongoDB), you might want to disable this to save the
723 try-and-fall-back cost.
724 </description>
725 </property>
726 <property>
727 <name>hive.metastore.direct.sql.batch.size</name>
728 <value>0</value>
729 <description>
730 Batch size for partition and other object retrieval from the underlying DB in direct
731 SQL. For some DBs like Oracle and MSSQL, there are hardcoded or perf-based limitations
732 that necessitate this. For DBs that can handle the queries, this isn't necessary and
733 may impede performance. -1 means no batching, 0 means automatic batching.
734 </description>
735 </property>
736 <property>
737 <name>hive.metastore.try.direct.sql.ddl</name>
738 <value>true</value>
739 <description>
740 Same as hive.metastore.try.direct.sql, for read statements within a transaction that
741 modifies metastore data. Due to non-standard behavior in Postgres, if a direct SQL
742 select query has incorrect syntax or something similar inside a transaction, the
743 entire transaction will fail and fall-back to DataNucleus will not be possible. You
744 should disable the usage of direct SQL inside transactions if that happens in your case.
745 </description>
746 </property>
747 <property>
748 <name>hive.metastore.orm.retrieveMapNullsAsEmptyStrings</name>
749 <value>false</value>
750 <description>Thrift does not support nulls in maps, so any nulls present in maps retrieved from ORM must either be pruned or converted to empty strings. Some backing dbs such as Oracle persist empty strings as nulls, so we should set this parameter if we wish to reverse that behaviour. For others, pruning is the correct behaviour</description>
751 </property>
752 <property>
753 <name>hive.metastore.disallow.incompatible.col.type.changes</name>
754 <value>false</value>
755 <description>
756 If true (default is false), ALTER TABLE operations which change the type of a
757 column (say STRING) to an incompatible type (say MAP) are disallowed.
758 RCFile default SerDe (ColumnarSerDe) serializes the values in such a way that the
759 datatypes can be converted from string to any type. The map is also serialized as
760 a string, which can be read as a string as well. However, with any binary
761 serialization, this is not true. Blocking the ALTER TABLE prevents ClassCastExceptions
762 when subsequently trying to access old partitions.
763
764 Primitive types like INT, STRING, BIGINT, etc., are compatible with each other and are
765 not blocked.
766
767 See HIVE-4409 for more details.
768 </description>
769 </property>
770 <property>
771 <name>hive.table.parameters.default</name>
772 <value/>
773 <description>Default property values for newly created tables</description>
774 </property>
775 <property>
776 <name>hive.ddl.createtablelike.properties.whitelist</name>
777 <value/>
778 <description>Table Properties to copy over when executing a Create Table Like.</description>
779 </property>
780 <property>
781 <name>hive.metastore.rawstore.impl</name>
782 <value>org.apache.hadoop.hive.metastore.ObjectStore</value>
783 <description>
784 Name of the class that implements org.apache.hadoop.hive.metastore.rawstore interface.
785 This class is used to store and retrieval of raw metadata objects such as table, database
786 </description>
787 </property>
788 <property>
789 <name>javax.jdo.option.ConnectionDriverName</name>
790 <value>org.apache.derby.jdbc.EmbeddedDriver</value>
791 <description>Driver class name for a JDBC metastore</description>
792 </property>
793 <property>
794 <name>javax.jdo.PersistenceManagerFactoryClass</name>
795 <value>org.datanucleus.api.jdo.JDOPersistenceManagerFactory</value>
796 <description>class implementing the jdo persistence</description>
797 </property>
798 <property>
799 <name>hive.metastore.expression.proxy</name>
800 <value>org.apache.hadoop.hive.ql.optimizer.ppr.PartitionExpressionForMetastore</value>
801 <description/>
802 </property>
803 <property>
804 <name>javax.jdo.option.DetachAllOnCommit</name>
805 <value>true</value>
806 <description>Detaches all objects from session so that they can be used after transaction is committed</description>
807 </property>
808 <property>
809 <name>javax.jdo.option.NonTransactionalRead</name>
810 <value>true</value>
811 <description>Reads outside of transactions</description>
812 </property>
813 <property>
814 <name>javax.jdo.option.ConnectionUserName</name>
815 <value>APP</value>
816 <description>Username to use against metastore database</description>
817 </property>
818 <property>
819 <name>hive.metastore.end.function.listeners</name>
820 <value/>
821 <description>List of comma separated listeners for the end of metastore functions.</description>
822 </property>
823 <property>
824 <name>hive.metastore.partition.inherit.table.properties</name>
825 <value/>
826 <description>
827 List of comma separated keys occurring in table properties which will get inherited to newly created partitions.
828 * implies all the keys will get inherited.
829 </description>
830 </property>
831 <property>
832 <name>hive.metastore.filter.hook</name>
833 <value>org.apache.hadoop.hive.metastore.DefaultMetaStoreFilterHookImpl</value>
834 <description>Metastore hook class for filtering the metadata read results. If hive.security.authorization.manageris set to instance of HiveAuthorizerFactory, then this value is ignored.</description>
835 </property>
836 <property>
837 <name>hive.metastore.dml.events</name>
838 <value>false</value>
839 <description>If true, the metastore will be asked to fire events for DML operations</description>
840 </property>
841 <property>
842 <name>hive.metastore.client.drop.partitions.using.expressions</name>
843 <value>true</value>
844 <description>Choose whether dropping partitions with HCatClient pushes the partition-predicate to the metastore, or drops partitions iteratively</description>
845 </property>
846 <property>
847 <name>hive.metastore.aggregate.stats.cache.enabled</name>
848 <value>true</value>
849 <description>Whether aggregate stats caching is enabled or not.</description>
850 </property>
851 <property>
852 <name>hive.metastore.aggregate.stats.cache.size</name>
853 <value>10000</value>
854 <description>Maximum number of aggregate stats nodes that we will place in the metastore aggregate stats cache.</description>
855 </property>
856 <property>
857 <name>hive.metastore.aggregate.stats.cache.max.partitions</name>
858 <value>10000</value>
859 <description>Maximum number of partitions that are aggregated per cache node.</description>
860 </property>
861 <property>
862 <name>hive.metastore.aggregate.stats.cache.fpp</name>
863 <value>0.01</value>
864 <description>Maximum false positive probability for the Bloom Filter used in each aggregate stats cache node (default 1%).</description>
865 </property>
866 <property>
867 <name>hive.metastore.aggregate.stats.cache.max.variance</name>
868 <value>0.01</value>
869 <description>Maximum tolerable variance in number of partitions between a cached node and our request (default 1%).</description>
870 </property>
871 <property>
872 <name>hive.metastore.aggregate.stats.cache.ttl</name>
873 <value>600s</value>
874 <description>
875 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
876 Number of seconds for a cached node to be active in the cache before they become stale.
877 </description>
878 </property>
879 <property>
880 <name>hive.metastore.aggregate.stats.cache.max.writer.wait</name>
881 <value>5000ms</value>
882 <description>
883 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
884 Number of milliseconds a writer will wait to acquire the writelock before giving up.
885 </description>
886 </property>
887 <property>
888 <name>hive.metastore.aggregate.stats.cache.max.reader.wait</name>
889 <value>1000ms</value>
890 <description>
891 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
892 Number of milliseconds a reader will wait to acquire the readlock before giving up.
893 </description>
894 </property>
895 <property>
896 <name>hive.metastore.aggregate.stats.cache.max.full</name>
897 <value>0.9</value>
898 <description>Maximum cache full % after which the cache cleaner thread kicks in.</description>
899 </property>
900 <property>
901 <name>hive.metastore.aggregate.stats.cache.clean.until</name>
902 <value>0.8</value>
903 <description>The cleaner thread cleans until cache reaches this % full size.</description>
904 </property>
905 <property>
906 <name>hive.metadata.export.location</name>
907 <value/>
908 <description>
909 When used in conjunction with the org.apache.hadoop.hive.ql.parse.MetaDataExportListener pre event listener,
910 it is the location to which the metadata will be exported. The default is an empty string, which results in the
911 metadata being exported to the current user's home directory on HDFS.
912 </description>
913 </property>
914 <property>
915 <name>hive.metadata.move.exported.metadata.to.trash</name>
916 <value>true</value>
917 <description>
918 When used in conjunction with the org.apache.hadoop.hive.ql.parse.MetaDataExportListener pre event listener,
919 this setting determines if the metadata that is exported will subsequently be moved to the user's trash directory
920 alongside the dropped table data. This ensures that the metadata will be cleaned up along with the dropped table data.
921 </description>
922 </property>
923 <property>
924 <name>hive.cli.errors.ignore</name>
925 <value>false</value>
926 <description/>
927 </property>
928 <property>
929 <name>hive.cli.print.current.db</name>
930 <value>false</value>
931 <description>Whether to include the current database in the Hive prompt.</description>
932 </property>
933 <property>
934 <name>hive.cli.prompt</name>
935 <value>hive</value>
936 <description>
937 Command line prompt configuration value. Other hiveconf can be used in this configuration value.
938 Variable substitution will only be invoked at the Hive CLI startup.
939 </description>
940 </property>
941 <property>
942 <name>hive.cli.pretty.output.num.cols</name>
943 <value>-1</value>
944 <description>
945 The number of columns to use when formatting output generated by the DESCRIBE PRETTY table_name command.
946 If the value of this property is -1, then Hive will use the auto-detected terminal width.
947 </description>
948 </property>
949 <property>
950 <name>hive.metastore.fs.handler.class</name>
951 <value>org.apache.hadoop.hive.metastore.HiveMetaStoreFsImpl</value>
952 <description/>
953 </property>
954 <property>
955 <name>hive.session.id</name>
956 <value/>
957 <description/>
958 </property>
959 <property>
960 <name>hive.session.silent</name>
961 <value>false</value>
962 <description/>
963 </property>
964 <property>
965 <name>hive.session.history.enabled</name>
966 <value>false</value>
967 <description>Whether to log Hive query, query plan, runtime statistics etc.</description>
968 </property>
969 <property>
970 <name>hive.query.string</name>
971 <value/>
972 <description>Query being executed (might be multiple per a session)</description>
973 </property>
974 <property>
975 <name>hive.query.id</name>
976 <value/>
977 <description>ID for query being executed (might be multiple per a session)</description>
978 </property>
979 <property>
980 <name>hive.jobname.length</name>
981 <value>50</value>
982 <description>max jobname length</description>
983 </property>
984 <property>
985 <name>hive.jar.path</name>
986 <value/>
987 <description>The location of hive_cli.jar that is used when submitting jobs in a separate jvm.</description>
988 </property>
989 <property>
990 <name>hive.aux.jars.path</name>
991 <value/>
992 <description>The location of the plugin jars that contain implementations of user defined functions and serdes.</description>
993 </property>
994 <property>
995 <name>hive.reloadable.aux.jars.path</name>
996 <value/>
997 <description>Jars can be renewed by executing reload command. And these jars can be used as the auxiliary classes like creating a UDF or SerDe.</description>
998 </property>
999 <property>
1000 <name>hive.added.files.path</name>
1001 <value/>
1002 <description>This an internal parameter.</description>
1003 </property>
1004 <property>
1005 <name>hive.added.jars.path</name>
1006 <value/>
1007 <description>This an internal parameter.</description>
1008 </property>
1009 <property>
1010 <name>hive.added.archives.path</name>
1011 <value/>
1012 <description>This an internal parameter.</description>
1013 </property>
1014 <property>
1015 <name>hive.auto.progress.timeout</name>
1016 <value>0s</value>
1017 <description>
1018 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
1019 How long to run autoprogressor for the script/UDTF operators.
1020 Set to 0 for forever.
1021 </description>
1022 </property>
1023 <property>
1024 <name>hive.script.auto.progress</name>
1025 <value>false</value>
1026 <description>
1027 Whether Hive Transform/Map/Reduce Clause should automatically send progress information to TaskTracker
1028 to avoid the task getting killed because of inactivity. Hive sends progress information when the script is
1029 outputting to stderr. This option removes the need of periodically producing stderr messages,
1030 but users should be cautious because this may prevent infinite loops in the scripts to be killed by TaskTracker.
1031 </description>
1032 </property>
1033 <property>
1034 <name>hive.script.operator.id.env.var</name>
1035 <value>HIVE_SCRIPT_OPERATOR_ID</value>
1036 <description>
1037 Name of the environment variable that holds the unique script operator ID in the user's
1038 transform function (the custom mapper/reducer that the user has specified in the query)
1039 </description>
1040 </property>
1041 <property>
1042 <name>hive.script.operator.truncate.env</name>
1043 <value>false</value>
1044 <description>Truncate each environment variable for external script in scripts operator to 20KB (to fit system limits)</description>
1045 </property>
1046 <property>
1047 <name>hive.script.operator.env.blacklist</name>
1048 <value>hive.txn.valid.txns,hive.script.operator.env.blacklist</value>
1049 <description>Comma separated list of keys from the configuration file not to convert to environment variables when envoking the script operator</description>
1050 </property>
1051 <property>
1052 <name>hive.mapred.mode</name>
1053 <value>nonstrict</value>
1054 <description>
1055 The mode in which the Hive operations are being performed.
1056 In strict mode, some risky queries are not allowed to run. They include:
1057 Cartesian Product.
1058 No partition being picked up for a query.
1059 Comparing bigints and strings.
1060 Comparing bigints and doubles.
1061 Orderby without limit.
1062 </description>
1063 </property>
1064 <property>
1065 <name>hive.alias</name>
1066 <value/>
1067 <description/>
1068 </property>
1069 <property>
1070 <name>hive.map.aggr</name>
1071 <value>true</value>
1072 <description>Whether to use map-side aggregation in Hive Group By queries</description>
1073 </property>
1074 <property>
1075 <name>hive.groupby.skewindata</name>
1076 <value>false</value>
1077 <description>Whether there is skew in data to optimize group by queries</description>
1078 </property>
1079 <property>
1080 <name>hive.join.emit.interval</name>
1081 <value>1000</value>
1082 <description>How many rows in the right-most join operand Hive should buffer before emitting the join result.</description>
1083 </property>
1084 <property>
1085 <name>hive.join.cache.size</name>
1086 <value>25000</value>
1087 <description>How many rows in the joining tables (except the streaming table) should be cached in memory.</description>
1088 </property>
1089 <property>
1090 <name>hive.cbo.enable</name>
1091 <value>true</value>
1092 <description>Flag to control enabling Cost Based Optimizations using Calcite framework.</description>
1093 </property>
1094 <property>
1095 <name>hive.cbo.returnpath.hiveop</name>
1096 <value>false</value>
1097 <description>Flag to control calcite plan to hive operator conversion</description>
1098 </property>
1099 <property>
1100 <name>hive.cbo.costmodel.extended</name>
1101 <value>false</value>
1102 <description>Flag to control enabling the extended cost model based onCPU, IO and cardinality. Otherwise, the cost model is based on cardinality.</description>
1103 </property>
1104 <property>
1105 <name>hive.cbo.costmodel.cpu</name>
1106 <value>0.000001</value>
1107 <description>Default cost of a comparison</description>
1108 </property>
1109 <property>
1110 <name>hive.cbo.costmodel.network</name>
1111 <value>150.0</value>
1112 <description>Default cost of a transfering a byte over network; expressed as multiple of CPU cost</description>
1113 </property>
1114 <property>
1115 <name>hive.cbo.costmodel.local.fs.write</name>
1116 <value>4.0</value>
1117 <description>Default cost of writing a byte to local FS; expressed as multiple of NETWORK cost</description>
1118 </property>
1119 <property>
1120 <name>hive.cbo.costmodel.local.fs.read</name>
1121 <value>4.0</value>
1122 <description>Default cost of reading a byte from local FS; expressed as multiple of NETWORK cost</description>
1123 </property>
1124 <property>
1125 <name>hive.cbo.costmodel.hdfs.write</name>
1126 <value>10.0</value>
1127 <description>Default cost of writing a byte to HDFS; expressed as multiple of Local FS write cost</description>
1128 </property>
1129 <property>
1130 <name>hive.cbo.costmodel.hdfs.read</name>
1131 <value>1.5</value>
1132 <description>Default cost of reading a byte from HDFS; expressed as multiple of Local FS read cost</description>
1133 </property>
1134 <property>
1135 <name>hive.mapjoin.bucket.cache.size</name>
1136 <value>100</value>
1137 <description/>
1138 </property>
1139 <property>
1140 <name>hive.mapjoin.optimized.hashtable</name>
1141 <value>true</value>
1142 <description>
1143 Whether Hive should use memory-optimized hash table for MapJoin. Only works on Tez,
1144 because memory-optimized hashtable cannot be serialized.
1145 </description>
1146 </property>
1147 <property>
1148 <name>hive.mapjoin.hybridgrace.hashtable</name>
1149 <value>true</value>
1150 <description>Whether to use hybridgrace hash join as the join method for mapjoin. Tez only.</description>
1151 </property>
1152 <property>
1153 <name>hive.mapjoin.hybridgrace.memcheckfrequency</name>
1154 <value>1024</value>
1155 <description>For hybrid grace hash join, how often (how many rows apart) we check if memory is full. This number should be power of 2.</description>
1156 </property>
1157 <property>
1158 <name>hive.mapjoin.hybridgrace.minwbsize</name>
1159 <value>524288</value>
1160 <description>For hybrid grace hash join, the minimum write buffer size used by optimized hashtable. Default is 512 KB.</description>
1161 </property>
1162 <property>
1163 <name>hive.mapjoin.hybridgrace.minnumpartitions</name>
1164 <value>16</value>
1165 <description>For hybrid grace hash join, the minimum number of partitions to create.</description>
1166 </property>
1167 <property>
1168 <name>hive.mapjoin.optimized.hashtable.wbsize</name>
1169 <value>10485760</value>
1170 <description>
1171 Optimized hashtable (see hive.mapjoin.optimized.hashtable) uses a chain of buffers to
1172 store data. This is one buffer size. HT may be slightly faster if this is larger, but for small
1173 joins unnecessary memory will be allocated and then trimmed.
1174 </description>
1175 </property>
1176 <property>
1177 <name>hive.smbjoin.cache.rows</name>
1178 <value>10000</value>
1179 <description>How many rows with the same key value should be cached in memory per smb joined table.</description>
1180 </property>
1181 <property>
1182 <name>hive.groupby.mapaggr.checkinterval</name>
1183 <value>100000</value>
1184 <description>Number of rows after which size of the grouping keys/aggregation classes is performed</description>
1185 </property>
1186 <property>
1187 <name>hive.map.aggr.hash.percentmemory</name>
1188 <value>0.5</value>
1189 <description>Portion of total memory to be used by map-side group aggregation hash table</description>
1190 </property>
1191 <property>
1192 <name>hive.mapjoin.followby.map.aggr.hash.percentmemory</name>
1193 <value>0.3</value>
1194 <description>Portion of total memory to be used by map-side group aggregation hash table, when this group by is followed by map join</description>
1195 </property>
1196 <property>
1197 <name>hive.map.aggr.hash.force.flush.memory.threshold</name>
1198 <value>0.9</value>
1199 <description>
1200 The max memory to be used by map-side group aggregation hash table.
1201 If the memory usage is higher than this number, force to flush data
1202 </description>
1203 </property>
1204 <property>
1205 <name>hive.map.aggr.hash.min.reduction</name>
1206 <value>0.5</value>
1207 <description>
1208 Hash aggregation will be turned off if the ratio between hash table size and input rows is bigger than this number.
1209 Set to 1 to make sure hash aggregation is never turned off.
1210 </description>
1211 </property>
1212 <property>
1213 <name>hive.multigroupby.singlereducer</name>
1214 <value>true</value>
1215 <description>
1216 Whether to optimize multi group by query to generate single M/R job plan. If the multi group by query has
1217 common group by keys, it will be optimized to generate single M/R job.
1218 </description>
1219 </property>
1220 <property>
1221 <name>hive.map.groupby.sorted</name>
1222 <value>false</value>
1223 <description>
1224 If the bucketing/sorting properties of the table exactly match the grouping key, whether to perform
1225 the group by in the mapper by using BucketizedHiveInputFormat. The only downside to this
1226 is that it limits the number of mappers to the number of files.
1227 </description>
1228 </property>
1229 <property>
1230 <name>hive.map.groupby.sorted.testmode</name>
1231 <value>false</value>
1232 <description>
1233 If the bucketing/sorting properties of the table exactly match the grouping key, whether to perform
1234 the group by in the mapper by using BucketizedHiveInputFormat. If the test mode is set, the plan
1235 is not converted, but a query property is set to denote the same.
1236 </description>
1237 </property>
1238 <property>
1239 <name>hive.groupby.orderby.position.alias</name>
1240 <value>false</value>
1241 <description>Whether to enable using Column Position Alias in Group By or Order By</description>
1242 </property>
1243 <property>
1244 <name>hive.new.job.grouping.set.cardinality</name>
1245 <value>30</value>
1246 <description>
1247 Whether a new map-reduce job should be launched for grouping sets/rollups/cubes.
1248 For a query like: select a, b, c, count(1) from T group by a, b, c with rollup;
1249 4 rows are created per row: (a, b, c), (a, b, null), (a, null, null), (null, null, null).
1250 This can lead to explosion across map-reduce boundary if the cardinality of T is very high,
1251 and map-side aggregation does not do a very good job.
1252
1253 This parameter decides if Hive should add an additional map-reduce job. If the grouping set
1254 cardinality (4 in the example above), is more than this value, a new MR job is added under the
1255 assumption that the original group by will reduce the data size.
1256 </description>
1257 </property>
1258 <property>
1259 <name>hive.exec.copyfile.maxsize</name>
1260 <value>33554432</value>
1261 <description>Maximum file size (in Mb) that Hive uses to do single HDFS copies between directories.Distributed copies (distcp) will be used instead for bigger files so that copies can be done faster.</description>
1262 </property>
1263 <property>
1264 <name>hive.udtf.auto.progress</name>
1265 <value>false</value>
1266 <description>
1267 Whether Hive should automatically send progress information to TaskTracker
1268 when using UDTF's to prevent the task getting killed because of inactivity. Users should be cautious
1269 because this may prevent TaskTracker from killing tasks with infinite loops.
1270 </description>
1271 </property>
1272 <property>
1273 <name>hive.default.fileformat</name>
1274 <value>TextFile</value>
1275 <description>
1276 Expects one of [textfile, sequencefile, rcfile, orc].
1277 Default file format for CREATE TABLE statement. Users can explicitly override it by CREATE TABLE ... STORED AS [FORMAT]
1278 </description>
1279 </property>
1280 <property>
1281 <name>hive.default.fileformat.managed</name>
1282 <value>none</value>
1283 <description>
1284 Expects one of [none, textfile, sequencefile, rcfile, orc].
1285 Default file format for CREATE TABLE statement applied to managed tables only. External tables will be
1286 created with format specified by hive.default.fileformat. Leaving this null will result in using hive.default.fileformat
1287 for all tables.
1288 </description>
1289 </property>
1290 <property>
1291 <name>hive.query.result.fileformat</name>
1292 <value>TextFile</value>
1293 <description>
1294 Expects one of [textfile, sequencefile, rcfile].
1295 Default file format for storing result of the query.
1296 </description>
1297 </property>
1298 <property>
1299 <name>hive.fileformat.check</name>
1300 <value>true</value>
1301 <description>Whether to check file format or not when loading data files</description>
1302 </property>
1303 <property>
1304 <name>hive.default.rcfile.serde</name>
1305 <value>org.apache.hadoop.hive.serde2.columnar.LazyBinaryColumnarSerDe</value>
1306 <description>The default SerDe Hive will use for the RCFile format</description>
1307 </property>
1308 <property>
1309 <name>hive.default.serde</name>
1310 <value>org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe</value>
1311 <description>The default SerDe Hive will use for storage formats that do not specify a SerDe.</description>
1312 </property>
1313 <property>
1314 <name>hive.serdes.using.metastore.for.schema</name>
1315 <value>org.apache.hadoop.hive.ql.io.orc.OrcSerde,org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe,org.apache.hadoop.hive.serde2.columnar.ColumnarSerDe,org.apache.hadoop.hive.serde2.dynamic_type.DynamicSerDe,org.apache.hadoop.hive.serde2.MetadataTypedColumnsetSerDe,org.apache.hadoop.hive.serde2.columnar.LazyBinaryColumnarSerDe,org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe,org.apache.hadoop.hive.serde2.lazybinary.LazyBinarySerDe</value>
1316 <description>SerDes retriving schema from metastore. This an internal parameter. Check with the hive dev. team</description>
1317 </property>
1318 <property>
1319 <name>hive.querylog.location</name>
1320 <value>${system:java.io.tmpdir}/${system:user.name}</value>
1321 <description>Location of Hive run time structured log file</description>
1322 </property>
1323 <property>
1324 <name>hive.querylog.enable.plan.progress</name>
1325 <value>true</value>
1326 <description>
1327 Whether to log the plan's progress every time a job's progress is checked.
1328 These logs are written to the location specified by hive.querylog.location
1329 </description>
1330 </property>
1331 <property>
1332 <name>hive.querylog.plan.progress.interval</name>
1333 <value>60000ms</value>
1334 <description>
1335 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
1336 The interval to wait between logging the plan's progress.
1337 If there is a whole number percentage change in the progress of the mappers or the reducers,
1338 the progress is logged regardless of this value.
1339 The actual interval will be the ceiling of (this value divided by the value of
1340 hive.exec.counters.pull.interval) multiplied by the value of hive.exec.counters.pull.interval
1341 I.e. if it is not divide evenly by the value of hive.exec.counters.pull.interval it will be
1342 logged less frequently than specified.
1343 This only has an effect if hive.querylog.enable.plan.progress is set to true.
1344 </description>
1345 </property>
1346 <property>
1347 <name>hive.script.serde</name>
1348 <value>org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe</value>
1349 <description>The default SerDe for transmitting input data to and reading output data from the user scripts. </description>
1350 </property>
1351 <property>
1352 <name>hive.script.recordreader</name>
1353 <value>org.apache.hadoop.hive.ql.exec.TextRecordReader</value>
1354 <description>The default record reader for reading data from the user scripts. </description>
1355 </property>
1356 <property>
1357 <name>hive.script.recordwriter</name>
1358 <value>org.apache.hadoop.hive.ql.exec.TextRecordWriter</value>
1359 <description>The default record writer for writing data to the user scripts. </description>
1360 </property>
1361 <property>
1362 <name>hive.transform.escape.input</name>
1363 <value>false</value>
1364 <description>
1365 This adds an option to escape special chars (newlines, carriage returns and
1366 tabs) when they are passed to the user script. This is useful if the Hive tables
1367 can contain data that contains special characters.
1368 </description>
1369 </property>
1370 <property>
1371 <name>hive.binary.record.max.length</name>
1372 <value>1000</value>
1373 <description>
1374 Read from a binary stream and treat each hive.binary.record.max.length bytes as a record.
1375 The last record before the end of stream can have less than hive.binary.record.max.length bytes
1376 </description>
1377 </property>
1378 <property>
1379 <name>hive.hwi.listen.host</name>
1380 <value>0.0.0.0</value>
1381 <description>This is the host address the Hive Web Interface will listen on</description>
1382 </property>
1383 <property>
1384 <name>hive.hwi.listen.port</name>
1385 <value>9999</value>
1386 <description>This is the port the Hive Web Interface will listen on</description>
1387 </property>
1388 <property>
1389 <name>hive.hwi.war.file</name>
1390 <value>${env:HWI_WAR_FILE}</value>
1391 <description>This sets the path to the HWI war file, relative to ${HIVE_HOME}. </description>
1392 </property>
1393 <property>
1394 <name>hive.mapred.local.mem</name>
1395 <value>0</value>
1396 <description>mapper/reducer memory in local mode</description>
1397 </property>
1398 <property>
1399 <name>hive.mapjoin.smalltable.filesize</name>
1400 <value>25000000</value>
1401 <description>
1402 The threshold for the input file size of the small tables; if the file size is smaller
1403 than this threshold, it will try to convert the common join into map join
1404 </description>
1405 </property>
1406 <property>
1407 <name>hive.sample.seednumber</name>
1408 <value>0</value>
1409 <description>A number used to percentage sampling. By changing this number, user will change the subsets of data sampled.</description>
1410 </property>
1411 <property>
1412 <name>hive.test.mode</name>
1413 <value>false</value>
1414 <description>Whether Hive is running in test mode. If yes, it turns on sampling and prefixes the output tablename.</description>
1415 </property>
1416 <property>
1417 <name>hive.test.mode.prefix</name>
1418 <value>test_</value>
1419 <description>In test mode, specfies prefixes for the output table</description>
1420 </property>
1421 <property>
1422 <name>hive.test.mode.samplefreq</name>
1423 <value>32</value>
1424 <description>
1425 In test mode, specfies sampling frequency for table, which is not bucketed,
1426 For example, the following query:
1427 INSERT OVERWRITE TABLE dest SELECT col1 from src
1428 would be converted to
1429 INSERT OVERWRITE TABLE test_dest
1430 SELECT col1 from src TABLESAMPLE (BUCKET 1 out of 32 on rand(1))
1431 </description>
1432 </property>
1433 <property>
1434 <name>hive.test.mode.nosamplelist</name>
1435 <value/>
1436 <description>In test mode, specifies comma separated table names which would not apply sampling</description>
1437 </property>
1438 <property>
1439 <name>hive.test.dummystats.aggregator</name>
1440 <value/>
1441 <description>internal variable for test</description>
1442 </property>
1443 <property>
1444 <name>hive.test.dummystats.publisher</name>
1445 <value/>
1446 <description>internal variable for test</description>
1447 </property>
1448 <property>
1449 <name>hive.test.currenttimestamp</name>
1450 <value/>
1451 <description>current timestamp for test</description>
1452 </property>
1453 <property>
1454 <name>hive.merge.mapfiles</name>
1455 <value>true</value>
1456 <description>Merge small files at the end of a map-only job</description>
1457 </property>
1458 <property>
1459 <name>hive.merge.mapredfiles</name>
1460 <value>false</value>
1461 <description>Merge small files at the end of a map-reduce job</description>
1462 </property>
1463 <property>
1464 <name>hive.merge.tezfiles</name>
1465 <value>false</value>
1466 <description>Merge small files at the end of a Tez DAG</description>
1467 </property>
1468 <property>
1469 <name>hive.merge.sparkfiles</name>
1470 <value>false</value>
1471 <description>Merge small files at the end of a Spark DAG Transformation</description>
1472 </property>
1473 <property>
1474 <name>hive.merge.size.per.task</name>
1475 <value>256000000</value>
1476 <description>Size of merged files at the end of the job</description>
1477 </property>
1478 <property>
1479 <name>hive.merge.smallfiles.avgsize</name>
1480 <value>16000000</value>
1481 <description>
1482 When the average output file size of a job is less than this number, Hive will start an additional
1483 map-reduce job to merge the output files into bigger files. This is only done for map-only jobs
1484 if hive.merge.mapfiles is true, and for map-reduce jobs if hive.merge.mapredfiles is true.
1485 </description>
1486 </property>
1487 <property>
1488 <name>hive.merge.rcfile.block.level</name>
1489 <value>true</value>
1490 <description/>
1491 </property>
1492 <property>
1493 <name>hive.merge.orcfile.stripe.level</name>
1494 <value>true</value>
1495 <description>
1496 When hive.merge.mapfiles, hive.merge.mapredfiles or hive.merge.tezfiles is enabled
1497 while writing a table with ORC file format, enabling this config will do stripe-level
1498 fast merge for small ORC files. Note that enabling this config will not honor the
1499 padding tolerance config (hive.exec.orc.block.padding.tolerance).
1500 </description>
1501 </property>
1502 <property>
1503 <name>hive.exec.rcfile.use.explicit.header</name>
1504 <value>true</value>
1505 <description>
1506 If this is set the header for RCFiles will simply be RCF. If this is not
1507 set the header will be that borrowed from sequence files, e.g. SEQ- followed
1508 by the input and output RCFile formats.
1509 </description>
1510 </property>
1511 <property>
1512 <name>hive.exec.rcfile.use.sync.cache</name>
1513 <value>true</value>
1514 <description/>
1515 </property>
1516 <property>
1517 <name>hive.io.rcfile.record.interval</name>
1518 <value>2147483647</value>
1519 <description/>
1520 </property>
1521 <property>
1522 <name>hive.io.rcfile.column.number.conf</name>
1523 <value>0</value>
1524 <description/>
1525 </property>
1526 <property>
1527 <name>hive.io.rcfile.tolerate.corruptions</name>
1528 <value>false</value>
1529 <description/>
1530 </property>
1531 <property>
1532 <name>hive.io.rcfile.record.buffer.size</name>
1533 <value>4194304</value>
1534 <description/>
1535 </property>
1536 <property>
1537 <name>parquet.memory.pool.ratio</name>
1538 <value>0.5</value>
1539 <description>
1540 Maximum fraction of heap that can be used by Parquet file writers in one task.
1541 It is for avoiding OutOfMemory error in tasks. Work with Parquet 1.6.0 and above.
1542 This config parameter is defined in Parquet, so that it does not start with 'hive.'.
1543 </description>
1544 </property>
1545 <property>
1546 <name>hive.parquet.timestamp.skip.conversion</name>
1547 <value>true</value>
1548 <description>Current Hive implementation of parquet stores timestamps to UTC, this flag allows skipping of the conversionon reading parquet files from other tools</description>
1549 </property>
1550 <property>
1551 <name>hive.int.timestamp.conversion.in.seconds</name>
1552 <value>false</value>
1553 <description>
1554 Boolean/tinyint/smallint/int/bigint value is interpreted as milliseconds during the timestamp conversion.
1555 Set this flag to true to interpret the value as seconds to be consistent with float/double.
1556 </description>
1557 </property>
1558 <property>
1559 <name>hive.exec.orc.memory.pool</name>
1560 <value>0.5</value>
1561 <description>Maximum fraction of heap that can be used by ORC file writers</description>
1562 </property>
1563 <property>
1564 <name>hive.exec.orc.write.format</name>
1565 <value/>
1566 <description>
1567 Define the version of the file to write. Possible values are 0.11 and 0.12.
1568 If this parameter is not defined, ORC will use the run length encoding (RLE)
1569 introduced in Hive 0.12. Any value other than 0.11 results in the 0.12 encoding.
1570 </description>
1571 </property>
1572 <property>
1573 <name>hive.exec.orc.default.stripe.size</name>
1574 <value>67108864</value>
1575 <description>Define the default ORC stripe size, in bytes.</description>
1576 </property>
1577 <property>
1578 <name>hive.exec.orc.default.block.size</name>
1579 <value>268435456</value>
1580 <description>Define the default file system block size for ORC files.</description>
1581 </property>
1582 <property>
1583 <name>hive.exec.orc.dictionary.key.size.threshold</name>
1584 <value>0.8</value>
1585 <description>
1586 If the number of keys in a dictionary is greater than this fraction of the total number of
1587 non-null rows, turn off dictionary encoding. Use 1 to always use dictionary encoding.
1588 </description>
1589 </property>
1590 <property>
1591 <name>hive.exec.orc.default.row.index.stride</name>
1592 <value>10000</value>
1593 <description>
1594 Define the default ORC index stride in number of rows. (Stride is the number of rows
1595 an index entry represents.)
1596 </description>
1597 </property>
1598 <property>
1599 <name>hive.orc.row.index.stride.dictionary.check</name>
1600 <value>true</value>
1601 <description>
1602 If enabled dictionary check will happen after first row index stride (default 10000 rows)
1603 else dictionary check will happen before writing first stripe. In both cases, the decision
1604 to use dictionary or not will be retained thereafter.
1605 </description>
1606 </property>
1607 <property>
1608 <name>hive.exec.orc.default.buffer.size</name>
1609 <value>262144</value>
1610 <description>Define the default ORC buffer size, in bytes.</description>
1611 </property>
1612 <property>
1613 <name>hive.exec.orc.default.block.padding</name>
1614 <value>true</value>
1615 <description>Define the default block padding, which pads stripes to the HDFS block boundaries.</description>
1616 </property>
1617 <property>
1618 <name>hive.exec.orc.block.padding.tolerance</name>
1619 <value>0.05</value>
1620 <description>
1621 Define the tolerance for block padding as a decimal fraction of stripe size (for
1622 example, the default value 0.05 is 5% of the stripe size). For the defaults of 64Mb
1623 ORC stripe and 256Mb HDFS blocks, the default block padding tolerance of 5% will
1624 reserve a maximum of 3.2Mb for padding within the 256Mb block. In that case, if the
1625 available size within the block is more than 3.2Mb, a new smaller stripe will be
1626 inserted to fit within that space. This will make sure that no stripe written will
1627 cross block boundaries and cause remote reads within a node local task.
1628 </description>
1629 </property>
1630 <property>
1631 <name>hive.exec.orc.default.compress</name>
1632 <value>ZLIB</value>
1633 <description>Define the default compression codec for ORC file</description>
1634 </property>
1635 <property>
1636 <name>hive.exec.orc.encoding.strategy</name>
1637 <value>SPEED</value>
1638 <description>
1639 Expects one of [speed, compression].
1640 Define the encoding strategy to use while writing data. Changing this will
1641 only affect the light weight encoding for integers. This flag will not
1642 change the compression level of higher level compression codec (like ZLIB).
1643 </description>
1644 </property>
1645 <property>
1646 <name>hive.exec.orc.compression.strategy</name>
1647 <value>SPEED</value>
1648 <description>
1649 Expects one of [speed, compression].
1650 Define the compression strategy to use while writing data.
1651 This changes the compression level of higher level compression codec (like ZLIB).
1652 </description>
1653 </property>
1654 <property>
1655 <name>hive.exec.orc.split.strategy</name>
1656 <value>HYBRID</value>
1657 <description>
1658 Expects one of [hybrid, bi, etl].
1659 This is not a user level config. BI strategy is used when the requirement is to spend less time in split generation as opposed to query execution (split generation does not read or cache file footers). ETL strategy is used when spending little more time in split generation is acceptable (split generation reads and caches file footers). HYBRID chooses between the above strategies based on heuristics.
1660 </description>
1661 </property>
1662 <property>
1663 <name>hive.orc.splits.include.file.footer</name>
1664 <value>false</value>
1665 <description>
1666 If turned on splits generated by orc will include metadata about the stripes in the file. This
1667 data is read remotely (from the client or HS2 machine) and sent to all the tasks.
1668 </description>
1669 </property>
1670 <property>
1671 <name>hive.orc.cache.stripe.details.size</name>
1672 <value>10000</value>
1673 <description>Cache size for keeping meta info about orc splits cached in the client.</description>
1674 </property>
1675 <property>
1676 <name>hive.orc.compute.splits.num.threads</name>
1677 <value>10</value>
1678 <description>How many threads orc should use to create splits in parallel.</description>
1679 </property>
1680 <property>
1681 <name>hive.exec.orc.skip.corrupt.data</name>
1682 <value>false</value>
1683 <description>
1684 If ORC reader encounters corrupt data, this value will be used to determine
1685 whether to skip the corrupt data or throw exception. The default behavior is to throw exception.
1686 </description>
1687 </property>
1688 <property>
1689 <name>hive.exec.orc.zerocopy</name>
1690 <value>false</value>
1691 <description>Use zerocopy reads with ORC. (This requires Hadoop 2.3 or later.)</description>
1692 </property>
1693 <property>
1694 <name>hive.lazysimple.extended_boolean_literal</name>
1695 <value>false</value>
1696 <description>
1697 LazySimpleSerde uses this property to determine if it treats 'T', 't', 'F', 'f',
1698 '1', and '0' as extened, legal boolean literal, in addition to 'TRUE' and 'FALSE'.
1699 The default is false, which means only 'TRUE' and 'FALSE' are treated as legal
1700 boolean literal.
1701 </description>
1702 </property>
1703 <property>
1704 <name>hive.optimize.skewjoin</name>
1705 <value>false</value>
1706 <description>
1707 Whether to enable skew join optimization.
1708 The algorithm is as follows: At runtime, detect the keys with a large skew. Instead of
1709 processing those keys, store them temporarily in an HDFS directory. In a follow-up map-reduce
1710 job, process those skewed keys. The same key need not be skewed for all the tables, and so,
1711 the follow-up map-reduce job (for the skewed keys) would be much faster, since it would be a
1712 map-join.
1713 </description>
1714 </property>
1715 <property>
1716 <name>hive.auto.convert.join</name>
1717 <value>true</value>
1718 <description>Whether Hive enables the optimization about converting common join into mapjoin based on the input file size</description>
1719 </property>
1720 <property>
1721 <name>hive.auto.convert.join.noconditionaltask</name>
1722 <value>true</value>
1723 <description>
1724 Whether Hive enables the optimization about converting common join into mapjoin based on the input file size.
1725 If this parameter is on, and the sum of size for n-1 of the tables/partitions for a n-way join is smaller than the
1726 specified size, the join is directly converted to a mapjoin (there is no conditional task).
1727 </description>
1728 </property>
1729 <property>
1730 <name>hive.auto.convert.join.noconditionaltask.size</name>
1731 <value>10000000</value>
1732 <description>
1733 If hive.auto.convert.join.noconditionaltask is off, this parameter does not take affect.
1734 However, if it is on, and the sum of size for n-1 of the tables/partitions for a n-way join is smaller than this size,
1735 the join is directly converted to a mapjoin(there is no conditional task). The default is 10MB
1736 </description>
1737 </property>
1738 <property>
1739 <name>hive.auto.convert.join.use.nonstaged</name>
1740 <value>false</value>
1741 <description>
1742 For conditional joins, if input stream from a small alias can be directly applied to join operator without
1743 filtering or projection, the alias need not to be pre-staged in distributed cache via mapred local task.
1744 Currently, this is not working with vectorization or tez execution engine.
1745 </description>
1746 </property>
1747 <property>
1748 <name>hive.skewjoin.key</name>
1749 <value>100000</value>
1750 <description>
1751 Determine if we get a skew key in join. If we see more than the specified number of rows with the same key in join operator,
1752 we think the key as a skew join key.
1753 </description>
1754 </property>
1755 <property>
1756 <name>hive.skewjoin.mapjoin.map.tasks</name>
1757 <value>10000</value>
1758 <description>
1759 Determine the number of map task used in the follow up map join job for a skew join.
1760 It should be used together with hive.skewjoin.mapjoin.min.split to perform a fine grained control.
1761 </description>
1762 </property>
1763 <property>
1764 <name>hive.skewjoin.mapjoin.min.split</name>
1765 <value>33554432</value>
1766 <description>
1767 Determine the number of map task at most used in the follow up map join job for a skew join by specifying
1768 the minimum split size. It should be used together with hive.skewjoin.mapjoin.map.tasks to perform a fine grained control.
1769 </description>
1770 </property>
1771 <property>
1772 <name>hive.heartbeat.interval</name>
1773 <value>1000</value>
1774 <description>Send a heartbeat after this interval - used by mapjoin and filter operators</description>
1775 </property>
1776 <property>
1777 <name>hive.limit.row.max.size</name>
1778 <value>100000</value>
1779 <description>When trying a smaller subset of data for simple LIMIT, how much size we need to guarantee each row to have at least.</description>
1780 </property>
1781 <property>
1782 <name>hive.limit.optimize.limit.file</name>
1783 <value>10</value>
1784 <description>When trying a smaller subset of data for simple LIMIT, maximum number of files we can sample.</description>
1785 </property>
1786 <property>
1787 <name>hive.limit.optimize.enable</name>
1788 <value>false</value>
1789 <description>Whether to enable to optimization to trying a smaller subset of data for simple LIMIT first.</description>
1790 </property>
1791 <property>
1792 <name>hive.limit.optimize.fetch.max</name>
1793 <value>50000</value>
1794 <description>
1795 Maximum number of rows allowed for a smaller subset of data for simple LIMIT, if it is a fetch query.
1796 Insert queries are not restricted by this limit.
1797 </description>
1798 </property>
1799 <property>
1800 <name>hive.limit.pushdown.memory.usage</name>
1801 <value>-1.0</value>
1802 <description>The max memory to be used for hash in RS operator for top K selection.</description>
1803 </property>
1804 <property>
1805 <name>hive.limit.query.max.table.partition</name>
1806 <value>-1</value>
1807 <description>
1808 This controls how many partitions can be scanned for each partitioned table.
1809 The default value "-1" means no limit.
1810 </description>
1811 </property>
1812 <property>
1813 <name>hive.hashtable.key.count.adjustment</name>
1814 <value>1.0</value>
1815 <description>Adjustment to mapjoin hashtable size derived from table and column statistics; the estimate of the number of keys is divided by this value. If the value is 0, statistics are not usedand hive.hashtable.initialCapacity is used instead.</description>
1816 </property>
1817 <property>
1818 <name>hive.hashtable.initialCapacity</name>
1819 <value>100000</value>
1820 <description>Initial capacity of mapjoin hashtable if statistics are absent, or if hive.hashtable.stats.key.estimate.adjustment is set to 0</description>
1821 </property>
1822 <property>
1823 <name>hive.hashtable.loadfactor</name>
1824 <value>0.75</value>
1825 <description/>
1826 </property>
1827 <property>
1828 <name>hive.mapjoin.followby.gby.localtask.max.memory.usage</name>
1829 <value>0.55</value>
1830 <description>
1831 This number means how much memory the local task can take to hold the key/value into an in-memory hash table
1832 when this map join is followed by a group by. If the local task's memory usage is more than this number,
1833 the local task will abort by itself. It means the data of the small table is too large to be held in memory.
1834 </description>
1835 </property>
1836 <property>
1837 <name>hive.mapjoin.localtask.max.memory.usage</name>
1838 <value>0.9</value>
1839 <description>
1840 This number means how much memory the local task can take to hold the key/value into an in-memory hash table.
1841 If the local task's memory usage is more than this number, the local task will abort by itself.
1842 It means the data of the small table is too large to be held in memory.
1843 </description>
1844 </property>
1845 <property>
1846 <name>hive.mapjoin.check.memory.rows</name>
1847 <value>100000</value>
1848 <description>The number means after how many rows processed it needs to check the memory usage</description>
1849 </property>
1850 <property>
1851 <name>hive.debug.localtask</name>
1852 <value>false</value>
1853 <description/>
1854 </property>
1855 <property>
1856 <name>hive.input.format</name>
1857 <value>org.apache.hadoop.hive.ql.io.CombineHiveInputFormat</value>
1858 <description>The default input format. Set this to HiveInputFormat if you encounter problems with CombineHiveInputFormat.</description>
1859 </property>
1860 <property>
1861 <name>hive.tez.input.format</name>
1862 <value>org.apache.hadoop.hive.ql.io.HiveInputFormat</value>
1863 <description>The default input format for tez. Tez groups splits in the AM.</description>
1864 </property>
1865 <property>
1866 <name>hive.tez.container.size</name>
1867 <value>-1</value>
1868 <description>By default Tez will spawn containers of the size of a mapper. This can be used to overwrite.</description>
1869 </property>
1870 <property>
1871 <name>hive.tez.cpu.vcores</name>
1872 <value>-1</value>
1873 <description>
1874 By default Tez will ask for however many cpus map-reduce is configured to use per container.
1875 This can be used to overwrite.
1876 </description>
1877 </property>
1878 <property>
1879 <name>hive.tez.java.opts</name>
1880 <value/>
1881 <description>By default Tez will use the Java options from map tasks. This can be used to overwrite.</description>
1882 </property>
1883 <property>
1884 <name>hive.tez.log.level</name>
1885 <value>INFO</value>
1886 <description>
1887 The log level to use for tasks executing as part of the DAG.
1888 Used only if hive.tez.java.opts is used to configure Java options.
1889 </description>
1890 </property>
1891 <property>
1892 <name>hive.enforce.bucketing</name>
1893 <value>false</value>
1894 <description>Whether bucketing is enforced. If true, while inserting into the table, bucketing is enforced.</description>
1895 </property>
1896 <property>
1897 <name>hive.enforce.sorting</name>
1898 <value>false</value>
1899 <description>Whether sorting is enforced. If true, while inserting into the table, sorting is enforced.</description>
1900 </property>
1901 <property>
1902 <name>hive.optimize.bucketingsorting</name>
1903 <value>true</value>
1904 <description>
1905 If hive.enforce.bucketing or hive.enforce.sorting is true, don't create a reducer for enforcing
1906 bucketing/sorting for queries of the form:
1907 insert overwrite table T2 select * from T1;
1908 where T1 and T2 are bucketed/sorted by the same keys into the same number of buckets.
1909 </description>
1910 </property>
1911 <property>
1912 <name>hive.mapred.partitioner</name>
1913 <value>org.apache.hadoop.hive.ql.io.DefaultHivePartitioner</value>
1914 <description/>
1915 </property>
1916 <property>
1917 <name>hive.enforce.sortmergebucketmapjoin</name>
1918 <value>false</value>
1919 <description>If the user asked for sort-merge bucketed map-side join, and it cannot be performed, should the query fail or not ?</description>
1920 </property>
1921 <property>
1922 <name>hive.enforce.bucketmapjoin</name>
1923 <value>false</value>
1924 <description>
1925 If the user asked for bucketed map-side join, and it cannot be performed,
1926 should the query fail or not ? For example, if the buckets in the tables being joined are
1927 not a multiple of each other, bucketed map-side join cannot be performed, and the
1928 query will fail if hive.enforce.bucketmapjoin is set to true.
1929 </description>
1930 </property>
1931 <property>
1932 <name>hive.auto.convert.sortmerge.join</name>
1933 <value>false</value>
1934 <description>Will the join be automatically converted to a sort-merge join, if the joined tables pass the criteria for sort-merge join.</description>
1935 </property>
1936 <property>
1937 <name>hive.auto.convert.sortmerge.join.bigtable.selection.policy</name>
1938 <value>org.apache.hadoop.hive.ql.optimizer.AvgPartitionSizeBasedBigTableSelectorForAutoSMJ</value>
1939 <description>
1940 The policy to choose the big table for automatic conversion to sort-merge join.
1941 By default, the table with the largest partitions is assigned the big table. All policies are:
1942 . based on position of the table - the leftmost table is selected
1943 org.apache.hadoop.hive.ql.optimizer.LeftmostBigTableSMJ.
1944 . based on total size (all the partitions selected in the query) of the table
1945 org.apache.hadoop.hive.ql.optimizer.TableSizeBasedBigTableSelectorForAutoSMJ.
1946 . based on average size (all the partitions selected in the query) of the table
1947 org.apache.hadoop.hive.ql.optimizer.AvgPartitionSizeBasedBigTableSelectorForAutoSMJ.
1948 New policies can be added in future.
1949 </description>
1950 </property>
1951 <property>
1952 <name>hive.auto.convert.sortmerge.join.to.mapjoin</name>
1953 <value>false</value>
1954 <description>
1955 If hive.auto.convert.sortmerge.join is set to true, and a join was converted to a sort-merge join,
1956 this parameter decides whether each table should be tried as a big table, and effectively a map-join should be
1957 tried. That would create a conditional task with n+1 children for a n-way join (1 child for each table as the
1958 big table), and the backup task will be the sort-merge join. In some cases, a map-join would be faster than a
1959 sort-merge join, if there is no advantage of having the output bucketed and sorted. For example, if a very big sorted
1960 and bucketed table with few files (say 10 files) are being joined with a very small sorter and bucketed table
1961 with few files (10 files), the sort-merge join will only use 10 mappers, and a simple map-only join might be faster
1962 if the complete small table can fit in memory, and a map-join can be performed.
1963 </description>
1964 </property>
1965 <property>
1966 <name>hive.exec.script.trust</name>
1967 <value>false</value>
1968 <description/>
1969 </property>
1970 <property>
1971 <name>hive.exec.rowoffset</name>
1972 <value>false</value>
1973 <description>Whether to provide the row offset virtual column</description>
1974 </property>
1975 <property>
1976 <name>hive.hadoop.supports.splittable.combineinputformat</name>
1977 <value>false</value>
1978 <description/>
1979 </property>
1980 <property>
1981 <name>hive.optimize.index.filter</name>
1982 <value>false</value>
1983 <description>Whether to enable automatic use of indexes</description>
1984 </property>
1985 <property>
1986 <name>hive.optimize.index.autoupdate</name>
1987 <value>false</value>
1988 <description>Whether to update stale indexes automatically</description>
1989 </property>
1990 <property>
1991 <name>hive.optimize.ppd</name>
1992 <value>true</value>
1993 <description>Whether to enable predicate pushdown</description>
1994 </property>
1995 <property>
1996 <name>hive.ppd.recognizetransivity</name>
1997 <value>true</value>
1998 <description>Whether to transitively replicate predicate filters over equijoin conditions.</description>
1999 </property>
2000 <property>
2001 <name>hive.ppd.remove.duplicatefilters</name>
2002 <value>true</value>
2003 <description>Whether to push predicates down into storage handlers. Ignored when hive.optimize.ppd is false.</description>
2004 </property>
2005 <property>
2006 <name>hive.optimize.constant.propagation</name>
2007 <value>true</value>
2008 <description>Whether to enable constant propagation optimizer</description>
2009 </property>
2010 <property>
2011 <name>hive.optimize.remove.identity.project</name>
2012 <value>true</value>
2013 <description>Removes identity project from operator tree</description>
2014 </property>
2015 <property>
2016 <name>hive.optimize.metadataonly</name>
2017 <value>true</value>
2018 <description/>
2019 </property>
2020 <property>
2021 <name>hive.optimize.null.scan</name>
2022 <value>true</value>
2023 <description>Dont scan relations which are guaranteed to not generate any rows</description>
2024 </property>
2025 <property>
2026 <name>hive.optimize.ppd.storage</name>
2027 <value>true</value>
2028 <description>Whether to push predicates down to storage handlers</description>
2029 </property>
2030 <property>
2031 <name>hive.optimize.groupby</name>
2032 <value>true</value>
2033 <description>Whether to enable the bucketed group by from bucketed partitions/tables.</description>
2034 </property>
2035 <property>
2036 <name>hive.optimize.bucketmapjoin</name>
2037 <value>false</value>
2038 <description>Whether to try bucket mapjoin</description>
2039 </property>
2040 <property>
2041 <name>hive.optimize.bucketmapjoin.sortedmerge</name>
2042 <value>false</value>
2043 <description>Whether to try sorted bucket merge map join</description>
2044 </property>
2045 <property>
2046 <name>hive.optimize.reducededuplication</name>
2047 <value>true</value>
2048 <description>
2049 Remove extra map-reduce jobs if the data is already clustered by the same key which needs to be used again.
2050 This should always be set to true. Since it is a new feature, it has been made configurable.
2051 </description>
2052 </property>
2053 <property>
2054 <name>hive.optimize.reducededuplication.min.reducer</name>
2055 <value>4</value>
2056 <description>
2057 Reduce deduplication merges two RSs by moving key/parts/reducer-num of the child RS to parent RS.
2058 That means if reducer-num of the child RS is fixed (order by or forced bucketing) and small, it can make very slow, single MR.
2059 The optimization will be automatically disabled if number of reducers would be less than specified value.
2060 </description>
2061 </property>
2062 <property>
2063 <name>hive.optimize.sort.dynamic.partition</name>
2064 <value>false</value>
2065 <description>
2066 When enabled dynamic partitioning column will be globally sorted.
2067 This way we can keep only one record writer open for each partition value
2068 in the reducer thereby reducing the memory pressure on reducers.
2069 </description>
2070 </property>
2071 <property>
2072 <name>hive.optimize.sampling.orderby</name>
2073 <value>false</value>
2074 <description>Uses sampling on order-by clause for parallel execution.</description>
2075 </property>
2076 <property>
2077 <name>hive.optimize.sampling.orderby.number</name>
2078 <value>1000</value>
2079 <description>Total number of samples to be obtained.</description>
2080 </property>
2081 <property>
2082 <name>hive.optimize.sampling.orderby.percent</name>
2083 <value>0.1</value>
2084 <description>
2085 Expects value between 0.0f and 1.0f.
2086 Probability with which a row will be chosen.
2087 </description>
2088 </property>
2089 <property>
2090 <name>hive.optimize.distinct.rewrite</name>
2091 <value>true</value>
2092 <description>When applicable this optimization rewrites distinct aggregates from a single stage to multi-stage aggregation. This may not be optimal in all cases. Ideally, whether to trigger it or not should be cost based decision. Until Hive formalizes cost model for this, this is config driven.</description>
2093 </property>
2094 <property>
2095 <name>hive.optimize.union.remove</name>
2096 <value>false</value>
2097 <description>
2098 Whether to remove the union and push the operators between union and the filesink above union.
2099 This avoids an extra scan of the output by union. This is independently useful for union
2100 queries, and specially useful when hive.optimize.skewjoin.compiletime is set to true, since an
2101 extra union is inserted.
2102
2103 The merge is triggered if either of hive.merge.mapfiles or hive.merge.mapredfiles is set to true.
2104 If the user has set hive.merge.mapfiles to true and hive.merge.mapredfiles to false, the idea was the
2105 number of reducers are few, so the number of files anyway are small. However, with this optimization,
2106 we are increasing the number of files possibly by a big margin. So, we merge aggressively.
2107 </description>
2108 </property>
2109 <property>
2110 <name>hive.optimize.correlation</name>
2111 <value>false</value>
2112 <description>exploit intra-query correlations.</description>
2113 </property>
2114 <property>
2115 <name>hive.mapred.supports.subdirectories</name>
2116 <value>false</value>
2117 <description>
2118 Whether the version of Hadoop which is running supports sub-directories for tables/partitions.
2119 Many Hive optimizations can be applied if the Hadoop version supports sub-directories for
2120 tables/partitions. It was added by MAPREDUCE-1501
2121 </description>
2122 </property>
2123 <property>
2124 <name>hive.optimize.skewjoin.compiletime</name>
2125 <value>false</value>
2126 <description>
2127 Whether to create a separate plan for skewed keys for the tables in the join.
2128 This is based on the skewed keys stored in the metadata. At compile time, the plan is broken
2129 into different joins: one for the skewed keys, and the other for the remaining keys. And then,
2130 a union is performed for the 2 joins generated above. So unless the same skewed key is present
2131 in both the joined tables, the join for the skewed key will be performed as a map-side join.
2132
2133 The main difference between this parameter and hive.optimize.skewjoin is that this parameter
2134 uses the skew information stored in the metastore to optimize the plan at compile time itself.
2135 If there is no skew information in the metadata, this parameter will not have any affect.
2136 Both hive.optimize.skewjoin.compiletime and hive.optimize.skewjoin should be set to true.
2137 Ideally, hive.optimize.skewjoin should be renamed as hive.optimize.skewjoin.runtime, but not doing
2138 so for backward compatibility.
2139
2140 If the skew information is correctly stored in the metadata, hive.optimize.skewjoin.compiletime
2141 would change the query plan to take care of it, and hive.optimize.skewjoin will be a no-op.
2142 </description>
2143 </property>
2144 <property>
2145 <name>hive.optimize.index.filter.compact.minsize</name>
2146 <value>5368709120</value>
2147 <description>Minimum size (in bytes) of the inputs on which a compact index is automatically used.</description>
2148 </property>
2149 <property>
2150 <name>hive.optimize.index.filter.compact.maxsize</name>
2151 <value>-1</value>
2152 <description>Maximum size (in bytes) of the inputs on which a compact index is automatically used. A negative number is equivalent to infinity.</description>
2153 </property>
2154 <property>
2155 <name>hive.index.compact.query.max.entries</name>
2156 <value>10000000</value>
2157 <description>The maximum number of index entries to read during a query that uses the compact index. Negative value is equivalent to infinity.</description>
2158 </property>
2159 <property>
2160 <name>hive.index.compact.query.max.size</name>
2161 <value>10737418240</value>
2162 <description>The maximum number of bytes that a query using the compact index can read. Negative value is equivalent to infinity.</description>
2163 </property>
2164 <property>
2165 <name>hive.index.compact.binary.search</name>
2166 <value>true</value>
2167 <description>Whether or not to use a binary search to find the entries in an index table that match the filter, where possible</description>
2168 </property>
2169 <property>
2170 <name>hive.stats.autogather</name>
2171 <value>true</value>
2172 <description>A flag to gather statistics automatically during the INSERT OVERWRITE command.</description>
2173 </property>
2174 <property>
2175 <name>hive.stats.dbclass</name>
2176 <value>fs</value>
2177 <description>
2178 Expects one of the pattern in [jdbc(:.*), hbase, counter, custom, fs].
2179 The storage that stores temporary Hive statistics. In filesystem based statistics collection ('fs'),
2180 each task writes statistics it has collected in a file on the filesystem, which will be aggregated
2181 after the job has finished. Supported values are fs (filesystem), jdbc:database (where database
2182 can be derby, mysql, etc.), hbase, counter, and custom as defined in StatsSetupConst.java.
2183 </description>
2184 </property>
2185 <property>
2186 <name>hive.stats.jdbcdriver</name>
2187 <value>org.apache.derby.jdbc.EmbeddedDriver</value>
2188 <description>The JDBC driver for the database that stores temporary Hive statistics.</description>
2189 </property>
2190 <property>
2191 <name>hive.stats.dbconnectionstring</name>
2192 <value>jdbc:derby:;databaseName=TempStatsStore;create=true</value>
2193 <description>The default connection string for the database that stores temporary Hive statistics.</description>
2194 </property>
2195 <property>
2196 <name>hive.stats.default.publisher</name>
2197 <value/>
2198 <description>The Java class (implementing the StatsPublisher interface) that is used by default if hive.stats.dbclass is custom type.</description>
2199 </property>
2200 <property>
2201 <name>hive.stats.default.aggregator</name>
2202 <value/>
2203 <description>The Java class (implementing the StatsAggregator interface) that is used by default if hive.stats.dbclass is custom type.</description>
2204 </property>
2205 <property>
2206 <name>hive.stats.jdbc.timeout</name>
2207 <value>30s</value>
2208 <description>
2209 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
2210 Timeout value used by JDBC connection and statements.
2211 </description>
2212 </property>
2213 <property>
2214 <name>hive.stats.atomic</name>
2215 <value>false</value>
2216 <description>whether to update metastore stats only if all stats are available</description>
2217 </property>
2218 <property>
2219 <name>hive.stats.retries.max</name>
2220 <value>0</value>
2221 <description>
2222 Maximum number of retries when stats publisher/aggregator got an exception updating intermediate database.
2223 Default is no tries on failures.
2224 </description>
2225 </property>
2226 <property>
2227 <name>hive.stats.retries.wait</name>
2228 <value>3000ms</value>
2229 <description>
2230 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
2231 The base waiting window before the next retry. The actual wait time is calculated by baseWindow * failures baseWindow * (failure + 1) * (random number between [0.0,1.0]).
2232 </description>
2233 </property>
2234 <property>
2235 <name>hive.stats.collect.rawdatasize</name>
2236 <value>true</value>
2237 <description>should the raw data size be collected when analyzing tables</description>
2238 </property>
2239 <property>
2240 <name>hive.client.stats.counters</name>
2241 <value/>
2242 <description>
2243 Subset of counters that should be of interest for hive.client.stats.publishers (when one wants to limit their publishing).
2244 Non-display names should be used
2245 </description>
2246 </property>
2247 <property>
2248 <name>hive.stats.reliable</name>
2249 <value>false</value>
2250 <description>
2251 Whether queries will fail because stats cannot be collected completely accurately.
2252 If this is set to true, reading/writing from/into a partition may fail because the stats
2253 could not be computed accurately.
2254 </description>
2255 </property>
2256 <property>
2257 <name>hive.analyze.stmt.collect.partlevel.stats</name>
2258 <value>true</value>
2259 <description>analyze table T compute statistics for columns. Queries like these should compute partitionlevel stats for partitioned table even when no part spec is specified.</description>
2260 </property>
2261 <property>
2262 <name>hive.stats.gather.num.threads</name>
2263 <value>10</value>
2264 <description>
2265 Number of threads used by partialscan/noscan analyze command for partitioned tables.
2266 This is applicable only for file formats that implement StatsProvidingRecordReader (like ORC).
2267 </description>
2268 </property>
2269 <property>
2270 <name>hive.stats.collect.tablekeys</name>
2271 <value>false</value>
2272 <description>
2273 Whether join and group by keys on tables are derived and maintained in the QueryPlan.
2274 This is useful to identify how tables are accessed and to determine if they should be bucketed.
2275 </description>
2276 </property>
2277 <property>
2278 <name>hive.stats.collect.scancols</name>
2279 <value>false</value>
2280 <description>
2281 Whether column accesses are tracked in the QueryPlan.
2282 This is useful to identify how tables are accessed and to determine if there are wasted columns that can be trimmed.
2283 </description>
2284 </property>
2285 <property>
2286 <name>hive.stats.ndv.error</name>
2287 <value>20.0</value>
2288 <description>
2289 Standard error expressed in percentage. Provides a tradeoff between accuracy and compute cost.
2290 A lower value for error indicates higher accuracy and a higher compute cost.
2291 </description>
2292 </property>
2293 <property>
2294 <name>hive.metastore.stats.ndv.densityfunction</name>
2295 <value>false</value>
2296 <description>Whether to use density function to estimate the NDV for the whole table based on the NDV of partitions</description>
2297 </property>
2298 <property>
2299 <name>hive.stats.key.prefix.max.length</name>
2300 <value>150</value>
2301 <description>
2302 Determines if when the prefix of the key used for intermediate stats collection
2303 exceeds a certain length, a hash of the key is used instead. If the value < 0 then hashing
2304 </description>
2305 </property>
2306 <property>
2307 <name>hive.stats.key.prefix.reserve.length</name>
2308 <value>24</value>
2309 <description>
2310 Reserved length for postfix of stats key. Currently only meaningful for counter type which should
2311 keep length of full stats key smaller than max length configured by hive.stats.key.prefix.max.length.
2312 For counter type, it should be bigger than the length of LB spec if exists.
2313 </description>
2314 </property>
2315 <property>
2316 <name>hive.stats.max.variable.length</name>
2317 <value>100</value>
2318 <description>
2319 To estimate the size of data flowing through operators in Hive/Tez(for reducer estimation etc.),
2320 average row size is multiplied with the total number of rows coming out of each operator.
2321 Average row size is computed from average column size of all columns in the row. In the absence
2322 of column statistics, for variable length columns (like string, bytes etc.), this value will be
2323 used. For fixed length columns their corresponding Java equivalent sizes are used
2324 (float - 4 bytes, double - 8 bytes etc.).
2325 </description>
2326 </property>
2327 <property>
2328 <name>hive.stats.list.num.entries</name>
2329 <value>10</value>
2330 <description>
2331 To estimate the size of data flowing through operators in Hive/Tez(for reducer estimation etc.),
2332 average row size is multiplied with the total number of rows coming out of each operator.
2333 Average row size is computed from average column size of all columns in the row. In the absence
2334 of column statistics and for variable length complex columns like list, the average number of
2335 entries/values can be specified using this config.
2336 </description>
2337 </property>
2338 <property>
2339 <name>hive.stats.map.num.entries</name>
2340 <value>10</value>
2341 <description>
2342 To estimate the size of data flowing through operators in Hive/Tez(for reducer estimation etc.),
2343 average row size is multiplied with the total number of rows coming out of each operator.
2344 Average row size is computed from average column size of all columns in the row. In the absence
2345 of column statistics and for variable length complex columns like map, the average number of
2346 entries/values can be specified using this config.
2347 </description>
2348 </property>
2349 <property>
2350 <name>hive.stats.fetch.partition.stats</name>
2351 <value>true</value>
2352 <description>
2353 Annotation of operator tree with statistics information requires partition level basic
2354 statistics like number of rows, data size and file size. Partition statistics are fetched from
2355 metastore. Fetching partition statistics for each needed partition can be expensive when the
2356 number of partitions is high. This flag can be used to disable fetching of partition statistics
2357 from metastore. When this flag is disabled, Hive will make calls to filesystem to get file sizes
2358 and will estimate the number of rows from row schema.
2359 </description>
2360 </property>
2361 <property>
2362 <name>hive.stats.fetch.column.stats</name>
2363 <value>false</value>
2364 <description>
2365 Annotation of operator tree with statistics information requires column statistics.
2366 Column statistics are fetched from metastore. Fetching column statistics for each needed column
2367 can be expensive when the number of columns is high. This flag can be used to disable fetching
2368 of column statistics from metastore.
2369 </description>
2370 </property>
2371 <property>
2372 <name>hive.stats.join.factor</name>
2373 <value>1.1</value>
2374 <description>
2375 Hive/Tez optimizer estimates the data size flowing through each of the operators. JOIN operator
2376 uses column statistics to estimate the number of rows flowing out of it and hence the data size.
2377 In the absence of column statistics, this factor determines the amount of rows that flows out
2378 of JOIN operator.
2379 </description>
2380 </property>
2381 <property>
2382 <name>hive.stats.deserialization.factor</name>
2383 <value>1.0</value>
2384 <description>
2385 Hive/Tez optimizer estimates the data size flowing through each of the operators. In the absence
2386 of basic statistics like number of rows and data size, file size is used to estimate the number
2387 of rows and data size. Since files in tables/partitions are serialized (and optionally
2388 compressed) the estimates of number of rows and data size cannot be reliably determined.
2389 This factor is multiplied with the file size to account for serialization and compression.
2390 </description>
2391 </property>
2392 <property>
2393 <name>hive.support.concurrency</name>
2394 <value>false</value>
2395 <description>
2396 Whether Hive supports concurrency control or not.
2397 A ZooKeeper instance must be up and running when using zookeeper Hive lock manager
2398 </description>
2399 </property>
2400 <property>
2401 <name>hive.lock.manager</name>
2402 <value>org.apache.hadoop.hive.ql.lockmgr.zookeeper.ZooKeeperHiveLockManager</value>
2403 <description/>
2404 </property>
2405 <property>
2406 <name>hive.lock.numretries</name>
2407 <value>100</value>
2408 <description>The number of times you want to try to get all the locks</description>
2409 </property>
2410 <property>
2411 <name>hive.unlock.numretries</name>
2412 <value>10</value>
2413 <description>The number of times you want to retry to do one unlock</description>
2414 </property>
2415 <property>
2416 <name>hive.lock.sleep.between.retries</name>
2417 <value>60s</value>
2418 <description>
2419 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
2420 The sleep time between various retries
2421 </description>
2422 </property>
2423 <property>
2424 <name>hive.lock.mapred.only.operation</name>
2425 <value>false</value>
2426 <description>
2427 This param is to control whether or not only do lock on queries
2428 that need to execute at least one mapred job.
2429 </description>
2430 </property>
2431 <property>
2432 <name>hive.zookeeper.quorum</name>
2433 <value/>
2434 <description>
2435 List of ZooKeeper servers to talk to. This is needed for:
2436 1. Read/write locks - when hive.lock.manager is set to
2437 org.apache.hadoop.hive.ql.lockmgr.zookeeper.ZooKeeperHiveLockManager,
2438 2. When HiveServer2 supports service discovery via Zookeeper.
2439 3. For delegation token storage if zookeeper store is used, if
2440 hive.cluster.delegation.token.store.zookeeper.connectString is not set
2441 </description>
2442 </property>
2443 <property>
2444 <name>hive.zookeeper.client.port</name>
2445 <value>2181</value>
2446 <description>
2447 The port of ZooKeeper servers to talk to.
2448 If the list of Zookeeper servers specified in hive.zookeeper.quorum
2449 does not contain port numbers, this value is used.
2450 </description>
2451 </property>
2452 <property>
2453 <name>hive.zookeeper.session.timeout</name>
2454 <value>1200000ms</value>
2455 <description>
2456 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
2457 ZooKeeper client's session timeout (in milliseconds). The client is disconnected, and as a result, all locks released,
2458 if a heartbeat is not sent in the timeout.
2459 </description>
2460 </property>
2461 <property>
2462 <name>hive.zookeeper.namespace</name>
2463 <value>hive_zookeeper_namespace</value>
2464 <description>The parent node under which all ZooKeeper nodes are created.</description>
2465 </property>
2466 <property>
2467 <name>hive.zookeeper.clean.extra.nodes</name>
2468 <value>false</value>
2469 <description>Clean extra nodes at the end of the session.</description>
2470 </property>
2471 <property>
2472 <name>hive.zookeeper.connection.max.retries</name>
2473 <value>3</value>
2474 <description>Max number of times to retry when connecting to the ZooKeeper server.</description>
2475 </property>
2476 <property>
2477 <name>hive.zookeeper.connection.basesleeptime</name>
2478 <value>1000ms</value>
2479 <description>
2480 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
2481 Initial amount of time (in milliseconds) to wait between retries
2482 when connecting to the ZooKeeper server when using ExponentialBackoffRetry policy.
2483 </description>
2484 </property>
2485 <property>
2486 <name>hive.txn.manager</name>
2487 <value>org.apache.hadoop.hive.ql.lockmgr.DummyTxnManager</value>
2488 <description>
2489 Set to org.apache.hadoop.hive.ql.lockmgr.DbTxnManager as part of turning on Hive
2490 transactions, which also requires appropriate settings for hive.compactor.initiator.on,
2491 hive.compactor.worker.threads, hive.support.concurrency (true), hive.enforce.bucketing
2492 (true), and hive.exec.dynamic.partition.mode (nonstrict).
2493 The default DummyTxnManager replicates pre-Hive-0.13 behavior and provides
2494 no transactions.
2495 </description>
2496 </property>
2497 <property>
2498 <name>hive.txn.timeout</name>
2499 <value>300s</value>
2500 <description>
2501 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
2502 time after which transactions are declared aborted if the client has not sent a heartbeat.
2503 </description>
2504 </property>
2505 <property>
2506 <name>hive.txn.max.open.batch</name>
2507 <value>1000</value>
2508 <description>
2509 Maximum number of transactions that can be fetched in one call to open_txns().
2510 This controls how many transactions streaming agents such as Flume or Storm open
2511 simultaneously. The streaming agent then writes that number of entries into a single
2512 file (per Flume agent or Storm bolt). Thus increasing this value decreases the number
2513 of delta files created by streaming agents. But it also increases the number of open
2514 transactions that Hive has to track at any given time, which may negatively affect
2515 read performance.
2516 </description>
2517 </property>
2518 <property>
2519 <name>hive.compactor.initiator.on</name>
2520 <value>false</value>
2521 <description>
2522 Whether to run the initiator and cleaner threads on this metastore instance or not.
2523 Set this to true on one instance of the Thrift metastore service as part of turning
2524 on Hive transactions. For a complete list of parameters required for turning on
2525 transactions, see hive.txn.manager.
2526 </description>
2527 </property>
2528 <property>
2529 <name>hive.compactor.worker.threads</name>
2530 <value>0</value>
2531 <description>
2532 How many compactor worker threads to run on this metastore instance. Set this to a
2533 positive number on one or more instances of the Thrift metastore service as part of
2534 turning on Hive transactions. For a complete list of parameters required for turning
2535 on transactions, see hive.txn.manager.
2536 Worker threads spawn MapReduce jobs to do compactions. They do not do the compactions
2537 themselves. Increasing the number of worker threads will decrease the time it takes
2538 tables or partitions to be compacted once they are determined to need compaction.
2539 It will also increase the background load on the Hadoop cluster as more MapReduce jobs
2540 will be running in the background.
2541 </description>
2542 </property>
2543 <property>
2544 <name>hive.compactor.worker.timeout</name>
2545 <value>86400s</value>
2546 <description>
2547 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
2548 Time in seconds after which a compaction job will be declared failed and the
2549 compaction re-queued.
2550 </description>
2551 </property>
2552 <property>
2553 <name>hive.compactor.check.interval</name>
2554 <value>300s</value>
2555 <description>
2556 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
2557 Time in seconds between checks to see if any tables or partitions need to be
2558 compacted. This should be kept high because each check for compaction requires
2559 many calls against the NameNode.
2560 Decreasing this value will reduce the time it takes for compaction to be started
2561 for a table or partition that requires compaction. However, checking if compaction
2562 is needed requires several calls to the NameNode for each table or partition that
2563 has had a transaction done on it since the last major compaction. So decreasing this
2564 value will increase the load on the NameNode.
2565 </description>
2566 </property>
2567 <property>
2568 <name>hive.compactor.delta.num.threshold</name>
2569 <value>10</value>
2570 <description>
2571 Number of delta directories in a table or partition that will trigger a minor
2572 compaction.
2573 </description>
2574 </property>
2575 <property>
2576 <name>hive.compactor.delta.pct.threshold</name>
2577 <value>0.1</value>
2578 <description>
2579 Percentage (fractional) size of the delta files relative to the base that will trigger
2580 a major compaction. (1.0 = 100%, so the default 0.1 = 10%.)
2581 </description>
2582 </property>
2583 <property>
2584 <name>hive.compactor.abortedtxn.threshold</name>
2585 <value>1000</value>
2586 <description>
2587 Number of aborted transactions involving a given table or partition that will trigger
2588 a major compaction.
2589 </description>
2590 </property>
2591 <property>
2592 <name>hive.compactor.cleaner.run.interval</name>
2593 <value>5000ms</value>
2594 <description>
2595 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
2596 Time between runs of the cleaner thread
2597 </description>
2598 </property>
2599 <property>
2600 <name>hive.hbase.wal.enabled</name>
2601 <value>true</value>
2602 <description>
2603 Whether writes to HBase should be forced to the write-ahead log.
2604 Disabling this improves HBase write performance at the risk of lost writes in case of a crash.
2605 </description>
2606 </property>
2607 <property>
2608 <name>hive.hbase.generatehfiles</name>
2609 <value>false</value>
2610 <description>True when HBaseStorageHandler should generate hfiles instead of operate against the online table.</description>
2611 </property>
2612 <property>
2613 <name>hive.hbase.snapshot.name</name>
2614 <value/>
2615 <description>The HBase table snapshot name to use.</description>
2616 </property>
2617 <property>
2618 <name>hive.hbase.snapshot.restoredir</name>
2619 <value>/tmp</value>
2620 <description>The directory in which to restore the HBase table snapshot.</description>
2621 </property>
2622 <property>
2623 <name>hive.archive.enabled</name>
2624 <value>false</value>
2625 <description>Whether archiving operations are permitted</description>
2626 </property>
2627 <property>
2628 <name>hive.optimize.index.groupby</name>
2629 <value>false</value>
2630 <description>Whether to enable optimization of group-by queries using Aggregate indexes.</description>
2631 </property>
2632 <property>
2633 <name>hive.outerjoin.supports.filters</name>
2634 <value>true</value>
2635 <description/>
2636 </property>
2637 <property>
2638 <name>hive.fetch.task.conversion</name>
2639 <value>more</value>
2640 <description>
2641 Expects one of [none, minimal, more].
2642 Some select queries can be converted to single FETCH task minimizing latency.
2643 Currently the query should be single sourced not having any subquery and should not have
2644 any aggregations or distincts (which incurs RS), lateral views and joins.
2645 0. none : disable hive.fetch.task.conversion
2646 1. minimal : SELECT STAR, FILTER on partition columns, LIMIT only
2647 2. more : SELECT, FILTER, LIMIT only (support TABLESAMPLE and virtual columns)
2648 </description>
2649 </property>
2650 <property>
2651 <name>hive.fetch.task.conversion.threshold</name>
2652 <value>1073741824</value>
2653 <description>
2654 Input threshold for applying hive.fetch.task.conversion. If target table is native, input length
2655 is calculated by summation of file lengths. If it's not native, storage handler for the table
2656 can optionally implement org.apache.hadoop.hive.ql.metadata.InputEstimator interface.
2657 </description>
2658 </property>
2659 <property>
2660 <name>hive.fetch.task.aggr</name>
2661 <value>false</value>
2662 <description>
2663 Aggregation queries with no group-by clause (for example, select count(*) from src) execute
2664 final aggregations in single reduce task. If this is set true, Hive delegates final aggregation
2665 stage to fetch task, possibly decreasing the query time.
2666 </description>
2667 </property>
2668 <property>
2669 <name>hive.compute.query.using.stats</name>
2670 <value>false</value>
2671 <description>
2672 When set to true Hive will answer a few queries like count(1) purely using stats
2673 stored in metastore. For basic stats collection turn on the config hive.stats.autogather to true.
2674 For more advanced stats collection need to run analyze table queries.
2675 </description>
2676 </property>
2677 <property>
2678 <name>hive.fetch.output.serde</name>
2679 <value>org.apache.hadoop.hive.serde2.DelimitedJSONSerDe</value>
2680 <description>The SerDe used by FetchTask to serialize the fetch output.</description>
2681 </property>
2682 <property>
2683 <name>hive.cache.expr.evaluation</name>
2684 <value>true</value>
2685 <description>
2686 If true, the evaluation result of a deterministic expression referenced twice or more
2687 will be cached.
2688 For example, in a filter condition like '.. where key + 10 = 100 or key + 10 = 0'
2689 the expression 'key + 10' will be evaluated/cached once and reused for the following
2690 expression ('key + 10 = 0'). Currently, this is applied only to expressions in select
2691 or filter operators.
2692 </description>
2693 </property>
2694 <property>
2695 <name>hive.variable.substitute</name>
2696 <value>true</value>
2697 <description>This enables substitution using syntax like ${var} ${system:var} and ${env:var}.</description>
2698 </property>
2699 <property>
2700 <name>hive.variable.substitute.depth</name>
2701 <value>40</value>
2702 <description>The maximum replacements the substitution engine will do.</description>
2703 </property>
2704 <property>
2705 <name>hive.conf.validation</name>
2706 <value>true</value>
2707 <description>Enables type checking for registered Hive configurations</description>
2708 </property>
2709 <property>
2710 <name>hive.semantic.analyzer.hook</name>
2711 <value/>
2712 <description/>
2713 </property>
2714 <property>
2715 <name>hive.security.authorization.enabled</name>
2716 <value>false</value>
2717 <description>enable or disable the Hive client authorization</description>
2718 </property>
2719 <property>
2720 <name>hive.security.authorization.manager</name>
2721 <value>org.apache.hadoop.hive.ql.security.authorization.DefaultHiveAuthorizationProvider</value>
2722 <description>
2723 The Hive client authorization manager class name. The user defined authorization class should implement
2724 interface org.apache.hadoop.hive.ql.security.authorization.HiveAuthorizationProvider.
2725 </description>
2726 </property>
2727 <property>
2728 <name>hive.security.authenticator.manager</name>
2729 <value>org.apache.hadoop.hive.ql.security.HadoopDefaultAuthenticator</value>
2730 <description>
2731 hive client authenticator manager class name. The user defined authenticator should implement
2732 interface org.apache.hadoop.hive.ql.security.HiveAuthenticationProvider.
2733 </description>
2734 </property>
2735 <property>
2736 <name>hive.security.metastore.authorization.manager</name>
2737 <value>org.apache.hadoop.hive.ql.security.authorization.DefaultHiveMetastoreAuthorizationProvider</value>
2738 <description>
2739 Names of authorization manager classes (comma separated) to be used in the metastore
2740 for authorization. The user defined authorization class should implement interface
2741 org.apache.hadoop.hive.ql.security.authorization.HiveMetastoreAuthorizationProvider.
2742 All authorization manager classes have to successfully authorize the metastore API
2743 call for the command execution to be allowed.
2744 </description>
2745 </property>
2746 <property>
2747 <name>hive.security.metastore.authorization.auth.reads</name>
2748 <value>true</value>
2749 <description>If this is true, metastore authorizer authorizes read actions on database, table</description>
2750 </property>
2751 <property>
2752 <name>hive.security.metastore.authenticator.manager</name>
2753 <value>org.apache.hadoop.hive.ql.security.HadoopDefaultMetastoreAuthenticator</value>
2754 <description>
2755 authenticator manager class name to be used in the metastore for authentication.
2756 The user defined authenticator should implement interface org.apache.hadoop.hive.ql.security.HiveAuthenticationProvider.
2757 </description>
2758 </property>
2759 <property>
2760 <name>hive.security.authorization.createtable.user.grants</name>
2761 <value/>
2762 <description>
2763 the privileges automatically granted to some users whenever a table gets created.
2764 An example like "userX,userY:select;userZ:create" will grant select privilege to userX and userY,
2765 and grant create privilege to userZ whenever a new table created.
2766 </description>
2767 </property>
2768 <property>
2769 <name>hive.security.authorization.createtable.group.grants</name>
2770 <value/>
2771 <description>
2772 the privileges automatically granted to some groups whenever a table gets created.
2773 An example like "groupX,groupY:select;groupZ:create" will grant select privilege to groupX and groupY,
2774 and grant create privilege to groupZ whenever a new table created.
2775 </description>
2776 </property>
2777 <property>
2778 <name>hive.security.authorization.createtable.role.grants</name>
2779 <value/>
2780 <description>
2781 the privileges automatically granted to some roles whenever a table gets created.
2782 An example like "roleX,roleY:select;roleZ:create" will grant select privilege to roleX and roleY,
2783 and grant create privilege to roleZ whenever a new table created.
2784 </description>
2785 </property>
2786 <property>
2787 <name>hive.security.authorization.createtable.owner.grants</name>
2788 <value/>
2789 <description>
2790 The privileges automatically granted to the owner whenever a table gets created.
2791 An example like "select,drop" will grant select and drop privilege to the owner
2792 of the table. Note that the default gives the creator of a table no access to the
2793 table (but see HIVE-8067).
2794 </description>
2795 </property>
2796 <property>
2797 <name>hive.security.authorization.task.factory</name>
2798 <value>org.apache.hadoop.hive.ql.parse.authorization.HiveAuthorizationTaskFactoryImpl</value>
2799 <description>Authorization DDL task factory implementation</description>
2800 </property>
2801 <property>
2802 <name>hive.security.authorization.sqlstd.confwhitelist</name>
2803 <value/>
2804 <description>
2805 List of comma separated Java regexes. Configurations parameters that match these
2806 regexes can be modified by user when SQL standard authorization is enabled.
2807 To get the default value, use the 'set <param>' command.
2808 Note that the hive.conf.restricted.list checks are still enforced after the white list
2809 check
2810 </description>
2811 </property>
2812 <property>
2813 <name>hive.security.authorization.sqlstd.confwhitelist.append</name>
2814 <value/>
2815 <description>
2816 List of comma separated Java regexes, to be appended to list set in
2817 hive.security.authorization.sqlstd.confwhitelist. Using this list instead
2818 of updating the original list means that you can append to the defaults
2819 set by SQL standard authorization instead of replacing it entirely.
2820 </description>
2821 </property>
2822 <property>
2823 <name>hive.cli.print.header</name>
2824 <value>false</value>
2825 <description>Whether to print the names of the columns in query output.</description>
2826 </property>
2827 <property>
2828 <name>hive.error.on.empty.partition</name>
2829 <value>false</value>
2830 <description>Whether to throw an exception if dynamic partition insert generates empty results.</description>
2831 </property>
2832 <property>
2833 <name>hive.index.compact.file</name>
2834 <value/>
2835 <description>internal variable</description>
2836 </property>
2837 <property>
2838 <name>hive.index.blockfilter.file</name>
2839 <value/>
2840 <description>internal variable</description>
2841 </property>
2842 <property>
2843 <name>hive.index.compact.file.ignore.hdfs</name>
2844 <value>false</value>
2845 <description>
2846 When true the HDFS location stored in the index file will be ignored at runtime.
2847 If the data got moved or the name of the cluster got changed, the index data should still be usable.
2848 </description>
2849 </property>
2850 <property>
2851 <name>hive.exim.uri.scheme.whitelist</name>
2852 <value>hdfs,pfile</value>
2853 <description>A comma separated list of acceptable URI schemes for import and export.</description>
2854 </property>
2855 <property>
2856 <name>hive.exim.strict.repl.tables</name>
2857 <value>true</value>
2858 <description>
2859 Parameter that determines if 'regular' (non-replication) export dumps can be
2860 imported on to tables that are the target of replication. If this parameter is
2861 set, regular imports will check if the destination table(if it exists) has a 'repl.last.id' set on it. If so, it will fail.
2862 </description>
2863 </property>
2864 <property>
2865 <name>hive.repl.task.factory</name>
2866 <value>org.apache.hive.hcatalog.api.repl.exim.EximReplicationTaskFactory</value>
2867 <description>
2868 Parameter that can be used to override which ReplicationTaskFactory will be
2869 used to instantiate ReplicationTask events. Override for third party repl plugins
2870 </description>
2871 </property>
2872 <property>
2873 <name>hive.mapper.cannot.span.multiple.partitions</name>
2874 <value>false</value>
2875 <description/>
2876 </property>
2877 <property>
2878 <name>hive.rework.mapredwork</name>
2879 <value>false</value>
2880 <description>
2881 should rework the mapred work or not.
2882 This is first introduced by SymlinkTextInputFormat to replace symlink files with real paths at compile time.
2883 </description>
2884 </property>
2885 <property>
2886 <name>hive.exec.concatenate.check.index</name>
2887 <value>true</value>
2888 <description>
2889 If this is set to true, Hive will throw error when doing
2890 'alter table tbl_name [partSpec] concatenate' on a table/partition
2891 that has indexes on it. The reason the user want to set this to true
2892 is because it can help user to avoid handling all index drop, recreation,
2893 rebuild work. This is very helpful for tables with thousands of partitions.
2894 </description>
2895 </property>
2896 <property>
2897 <name>hive.io.exception.handlers</name>
2898 <value/>
2899 <description>
2900 A list of io exception handler class names. This is used
2901 to construct a list exception handlers to handle exceptions thrown
2902 by record readers
2903 </description>
2904 </property>
2905 <property>
2906 <name>hive.server2.logging.operation.enabled</name>
2907 <value>true</value>
2908 <description>When true, HS2 will save operation logs and make them available for clients</description>
2909 </property>
2910 <property>
2911 <name>hive.server2.logging.operation.log.location</name>
2912 <value>${system:java.io.tmpdir}/${system:user.name}/operation_logs</value>
2913 <description>Top level directory where operation logs are stored if logging functionality is enabled</description>
2914 </property>
2915 <property>
2916 <name>hive.server2.logging.operation.level</name>
2917 <value>EXECUTION</value>
2918 <description>
2919 Expects one of [none, execution, performance, verbose].
2920 HS2 operation logging mode available to clients to be set at session level.
2921 For this to work, hive.server2.logging.operation.enabled should be set to true.
2922 NONE: Ignore any logging
2923 EXECUTION: Log completion of tasks
2924 PERFORMANCE: Execution + Performance logs
2925 VERBOSE: All logs
2926 </description>
2927 </property>
2928 <property>
2929 <name>hive.log4j.file</name>
2930 <value/>
2931 <description>
2932 Hive log4j configuration file.
2933 If the property is not set, then logging will be initialized using hive-log4j.properties found on the classpath.
2934 If the property is set, the value must be a valid URI (java.net.URI, e.g. "file:///tmp/my-logging.properties"),
2935 which you can then extract a URL from and pass to PropertyConfigurator.configure(URL).
2936 </description>
2937 </property>
2938 <property>
2939 <name>hive.exec.log4j.file</name>
2940 <value/>
2941 <description>
2942 Hive log4j configuration file for execution mode(sub command).
2943 If the property is not set, then logging will be initialized using hive-exec-log4j.properties found on the classpath.
2944 If the property is set, the value must be a valid URI (java.net.URI, e.g. "file:///tmp/my-logging.properties"),
2945 which you can then extract a URL from and pass to PropertyConfigurator.configure(URL).
2946 </description>
2947 </property>
2948 <property>
2949 <name>hive.log.explain.output</name>
2950 <value>false</value>
2951 <description>
2952 Whether to log explain output for every query.
2953 When enabled, will log EXPLAIN EXTENDED output for the query at INFO log4j log level.
2954 </description>
2955 </property>
2956 <property>
2957 <name>hive.explain.user</name>
2958 <value>false</value>
2959 <description>
2960 Whether to show explain result at user level.
2961 When enabled, will log EXPLAIN output for the query at user level.
2962 </description>
2963 </property>
2964 <property>
2965 <name>hive.autogen.columnalias.prefix.label</name>
2966 <value>_c</value>
2967 <description>
2968 String used as a prefix when auto generating column alias.
2969 By default the prefix label will be appended with a column position number to form the column alias.
2970 Auto generation would happen if an aggregate function is used in a select clause without an explicit alias.
2971 </description>
2972 </property>
2973 <property>
2974 <name>hive.autogen.columnalias.prefix.includefuncname</name>
2975 <value>false</value>
2976 <description>Whether to include function name in the column alias auto generated by Hive.</description>
2977 </property>
2978 <property>
2979 <name>hive.exec.perf.logger</name>
2980 <value>org.apache.hadoop.hive.ql.log.PerfLogger</value>
2981 <description>
2982 The class responsible for logging client side performance metrics.
2983 Must be a subclass of org.apache.hadoop.hive.ql.log.PerfLogger
2984 </description>
2985 </property>
2986 <property>
2987 <name>hive.start.cleanup.scratchdir</name>
2988 <value>false</value>
2989 <description>To cleanup the Hive scratchdir when starting the Hive Server</description>
2990 </property>
2991 <property>
2992 <name>hive.insert.into.multilevel.dirs</name>
2993 <value>false</value>
2994 <description>
2995 Where to insert into multilevel directories like
2996 "insert directory '/HIVEFT25686/chinna/' from table"
2997 </description>
2998 </property>
2999 <property>
3000 <name>hive.warehouse.subdir.inherit.perms</name>
3001 <value>true</value>
3002 <description>
3003 Set this to false if the table directories should be created
3004 with the permissions derived from dfs umask instead of
3005 inheriting the permission of the warehouse or database directory.
3006 </description>
3007 </property>
3008 <property>
3009 <name>hive.insert.into.external.tables</name>
3010 <value>true</value>
3011 <description>whether insert into external tables is allowed</description>
3012 </property>
3013 <property>
3014 <name>hive.exec.temporary.table.storage</name>
3015 <value>default</value>
3016 <description>
3017 Expects one of [memory, ssd, default].
3018 Define the storage policy for temporary tables.Choices between memory, ssd and default
3019 </description>
3020 </property>
3021 <property>
3022 <name>hive.exec.driver.run.hooks</name>
3023 <value/>
3024 <description>A comma separated list of hooks which implement HiveDriverRunHook. Will be run at the beginning and end of Driver.run, these will be run in the order specified.</description>
3025 </property>
3026 <property>
3027 <name>hive.ddl.output.format</name>
3028 <value/>
3029 <description>
3030 The data format to use for DDL output. One of "text" (for human
3031 readable text) or "json" (for a json object).
3032 </description>
3033 </property>
3034 <property>
3035 <name>hive.entity.separator</name>
3036 <value>@</value>
3037 <description>Separator used to construct names of tables and partitions. For example, dbname@tablename@partitionname</description>
3038 </property>
3039 <property>
3040 <name>hive.entity.capture.transform</name>
3041 <value>false</value>
3042 <description>Compiler to capture transform URI referred in the query</description>
3043 </property>
3044 <property>
3045 <name>hive.display.partition.cols.separately</name>
3046 <value>true</value>
3047 <description>
3048 In older Hive version (0.10 and earlier) no distinction was made between
3049 partition columns or non-partition columns while displaying columns in describe
3050 table. From 0.12 onwards, they are displayed separately. This flag will let you
3051 get old behavior, if desired. See, test-case in patch for HIVE-6689.
3052 </description>
3053 </property>
3054 <property>
3055 <name>hive.ssl.protocol.blacklist</name>
3056 <value>SSLv2,SSLv3</value>
3057 <description>SSL Versions to disable for all Hive Servers</description>
3058 </property>
3059 <property>
3060 <name>hive.server2.max.start.attempts</name>
3061 <value>30</value>
3062 <description>
3063 Expects value bigger than 0.
3064 Number of times HiveServer2 will attempt to start before exiting, sleeping 60 seconds between retries.
3065 The default of 30 will keep trying for 30 minutes.
3066 </description>
3067 </property>
3068 <property>
3069 <name>hive.server2.support.dynamic.service.discovery</name>
3070 <value>false</value>
3071 <description>Whether HiveServer2 supports dynamic service discovery for its clients. To support this, each instance of HiveServer2 currently uses ZooKeeper to register itself, when it is brought up. JDBC/ODBC clients should use the ZooKeeper ensemble: hive.zookeeper.quorum in their connection string.</description>
3072 </property>
3073 <property>
3074 <name>hive.server2.zookeeper.namespace</name>
3075 <value>hiveserver2</value>
3076 <description>The parent node in ZooKeeper used by HiveServer2 when supporting dynamic service discovery.</description>
3077 </property>
3078 <property>
3079 <name>hive.server2.global.init.file.location</name>
3080 <value>${env:HIVE_CONF_DIR}</value>
3081 <description>
3082 Either the location of a HS2 global init file or a directory containing a .hiverc file. If the
3083 property is set, the value must be a valid path to an init file or directory where the init file is located.
3084 </description>
3085 </property>
3086 <property>
3087 <name>hive.server2.transport.mode</name>
3088 <value>binary</value>
3089 <description>
3090 Expects one of [binary, http].
3091 Transport mode of HiveServer2.
3092 </description>
3093 </property>
3094 <property>
3095 <name>hive.server2.thrift.bind.host</name>
3096 <value/>
3097 <description>Bind host on which to run the HiveServer2 Thrift service.</description>
3098 </property>
3099 <property>
3100 <name>hive.server2.thrift.http.port</name>
3101 <value>10001</value>
3102 <description>Port number of HiveServer2 Thrift interface when hive.server2.transport.mode is 'http'.</description>
3103 </property>
3104 <property>
3105 <name>hive.server2.thrift.http.path</name>
3106 <value>cliservice</value>
3107 <description>Path component of URL endpoint when in HTTP mode.</description>
3108 </property>
3109 <property>
3110 <name>hive.server2.thrift.max.message.size</name>
3111 <value>104857600</value>
3112 <description>Maximum message size in bytes a HS2 server will accept.</description>
3113 </property>
3114 <property>
3115 <name>hive.server2.thrift.http.max.idle.time</name>
3116 <value>1800s</value>
3117 <description>
3118 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
3119 Maximum idle time for a connection on the server when in HTTP mode.
3120 </description>
3121 </property>
3122 <property>
3123 <name>hive.server2.thrift.http.worker.keepalive.time</name>
3124 <value>60s</value>
3125 <description>
3126 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
3127 Keepalive time for an idle http worker thread. When the number of workers exceeds min workers, excessive threads are killed after this time interval.
3128 </description>
3129 </property>
3130 <property>
3131 <name>hive.server2.thrift.http.cookie.auth.enabled</name>
3132 <value>true</value>
3133 <description>When true, HiveServer2 in HTTP transport mode, will use cookie based authentication mechanism.</description>
3134 </property>
3135 <property>
3136 <name>hive.server2.thrift.http.cookie.max.age</name>
3137 <value>86400s</value>
3138 <description>
3139 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
3140 Maximum age in seconds for server side cookie used by HS2 in HTTP mode.
3141 </description>
3142 </property>
3143 <property>
3144 <name>hive.server2.thrift.http.cookie.domain</name>
3145 <value/>
3146 <description>Domain for the HS2 generated cookies</description>
3147 </property>
3148 <property>
3149 <name>hive.server2.thrift.http.cookie.path</name>
3150 <value/>
3151 <description>Path for the HS2 generated cookies</description>
3152 </property>
3153 <property>
3154 <name>hive.server2.thrift.http.cookie.is.secure</name>
3155 <value>true</value>
3156 <description>Secure attribute of the HS2 generated cookie.</description>
3157 </property>
3158 <property>
3159 <name>hive.server2.thrift.http.cookie.is.httponly</name>
3160 <value>true</value>
3161 <description>HttpOnly attribute of the HS2 generated cookie.</description>
3162 </property>
3163 <property>
3164 <name>hive.server2.thrift.port</name>
3165 <value>10000</value>
3166 <description>Port number of HiveServer2 Thrift interface when hive.server2.transport.mode is 'binary'.</description>
3167 </property>
3168 <property>
3169 <name>hive.server2.thrift.sasl.qop</name>
3170 <value>auth</value>
3171 <description>
3172 Expects one of [auth, auth-int, auth-conf].
3173 Sasl QOP value; set it to one of following values to enable higher levels of
3174 protection for HiveServer2 communication with clients.
3175 Setting hadoop.rpc.protection to a higher level than HiveServer2 does not
3176 make sense in most situations. HiveServer2 ignores hadoop.rpc.protection in favor
3177 of hive.server2.thrift.sasl.qop.
3178 "auth" - authentication only (default)
3179 "auth-int" - authentication plus integrity protection
3180 "auth-conf" - authentication plus integrity and confidentiality protection
3181 This is applicable only if HiveServer2 is configured to use Kerberos authentication.
3182 </description>
3183 </property>
3184 <property>
3185 <name>hive.server2.thrift.min.worker.threads</name>
3186 <value>5</value>
3187 <description>Minimum number of Thrift worker threads</description>
3188 </property>
3189 <property>
3190 <name>hive.server2.thrift.max.worker.threads</name>
3191 <value>500</value>
3192 <description>Maximum number of Thrift worker threads</description>
3193 </property>
3194 <property>
3195 <name>hive.server2.thrift.exponential.backoff.slot.length</name>
3196 <value>100ms</value>
3197 <description>
3198 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
3199 Binary exponential backoff slot time for Thrift clients during login to HiveServer2,
3200 for retries until hitting Thrift client timeout
3201 </description>
3202 </property>
3203 <property>
3204 <name>hive.server2.thrift.login.timeout</name>
3205 <value>20s</value>
3206 <description>
3207 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
3208 Timeout for Thrift clients during login to HiveServer2
3209 </description>
3210 </property>
3211 <property>
3212 <name>hive.server2.thrift.worker.keepalive.time</name>
3213 <value>60s</value>
3214 <description>
3215 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
3216 Keepalive time (in seconds) for an idle worker thread. When the number of workers exceeds min workers, excessive threads are killed after this time interval.
3217 </description>
3218 </property>
3219 <property>
3220 <name>hive.server2.async.exec.threads</name>
3221 <value>100</value>
3222 <description>Number of threads in the async thread pool for HiveServer2</description>
3223 </property>
3224 <property>
3225 <name>hive.server2.async.exec.shutdown.timeout</name>
3226 <value>10s</value>
3227 <description>
3228 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
3229 How long HiveServer2 shutdown will wait for async threads to terminate.
3230 </description>
3231 </property>
3232 <property>
3233 <name>hive.server2.async.exec.wait.queue.size</name>
3234 <value>100</value>
3235 <description>
3236 Size of the wait queue for async thread pool in HiveServer2.
3237 After hitting this limit, the async thread pool will reject new requests.
3238 </description>
3239 </property>
3240 <property>
3241 <name>hive.server2.async.exec.keepalive.time</name>
3242 <value>10s</value>
3243 <description>
3244 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
3245 Time that an idle HiveServer2 async thread (from the thread pool) will wait for a new task
3246 to arrive before terminating
3247 </description>
3248 </property>
3249 <property>
3250 <name>hive.server2.long.polling.timeout</name>
3251 <value>5000ms</value>
3252 <description>
3253 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
3254 Time that HiveServer2 will wait before responding to asynchronous calls that use long polling
3255 </description>
3256 </property>
3257 <property>
3258 <name>hive.server2.authentication</name>
3259 <value>NONE</value>
3260 <description>
3261 Expects one of [nosasl, none, ldap, kerberos, pam, custom].
3262 Client authentication types.
3263 NONE: no authentication check
3264 LDAP: LDAP/AD based authentication
3265 KERBEROS: Kerberos/GSSAPI authentication
3266 CUSTOM: Custom authentication provider
3267 (Use with property hive.server2.custom.authentication.class)
3268 PAM: Pluggable authentication module
3269 NOSASL: Raw transport
3270 </description>
3271 </property>
3272 <property>
3273 <name>hive.server2.allow.user.substitution</name>
3274 <value>true</value>
3275 <description>Allow alternate user to be specified as part of HiveServer2 open connection request.</description>
3276 </property>
3277 <property>
3278 <name>hive.server2.authentication.kerberos.keytab</name>
3279 <value/>
3280 <description>Kerberos keytab file for server principal</description>
3281 </property>
3282 <property>
3283 <name>hive.server2.authentication.kerberos.principal</name>
3284 <value/>
3285 <description>Kerberos server principal</description>
3286 </property>
3287 <property>
3288 <name>hive.server2.authentication.spnego.keytab</name>
3289 <value/>
3290 <description>
3291 keytab file for SPNego principal, optional,
3292 typical value would look like /etc/security/keytabs/spnego.service.keytab,
3293 This keytab would be used by HiveServer2 when Kerberos security is enabled and
3294 HTTP transport mode is used.
3295 This needs to be set only if SPNEGO is to be used in authentication.
3296 SPNego authentication would be honored only if valid
3297 hive.server2.authentication.spnego.principal
3298 and
3299 hive.server2.authentication.spnego.keytab
3300 are specified.
3301 </description>
3302 </property>
3303 <property>
3304 <name>hive.server2.authentication.spnego.principal</name>
3305 <value/>
3306 <description>
3307 SPNego service principal, optional,
3308 typical value would look like HTTP/_HOST@EXAMPLE.COM
3309 SPNego service principal would be used by HiveServer2 when Kerberos security is enabled
3310 and HTTP transport mode is used.
3311 This needs to be set only if SPNEGO is to be used in authentication.
3312 </description>
3313 </property>
3314 <property>
3315 <name>hive.server2.authentication.ldap.url</name>
3316 <value/>
3317 <description>
3318 LDAP connection URL(s),
3319 this value could contain URLs to mutiple LDAP servers instances for HA,
3320 each LDAP URL is separated by a SPACE character. URLs are used in the
3321 order specified until a connection is successful.
3322 </description>
3323 </property>
3324 <property>
3325 <name>hive.server2.authentication.ldap.baseDN</name>
3326 <value/>
3327 <description>LDAP base DN</description>
3328 </property>
3329 <property>
3330 <name>hive.server2.authentication.ldap.Domain</name>
3331 <value/>
3332 <description/>
3333 </property>
3334 <property>
3335 <name>hive.server2.custom.authentication.class</name>
3336 <value/>
3337 <description>
3338 Custom authentication class. Used when property
3339 'hive.server2.authentication' is set to 'CUSTOM'. Provided class
3340 must be a proper implementation of the interface
3341 org.apache.hive.service.auth.PasswdAuthenticationProvider. HiveServer2
3342 will call its Authenticate(user, passed) method to authenticate requests.
3343 The implementation may optionally implement Hadoop's
3344 org.apache.hadoop.conf.Configurable class to grab Hive's Configuration object.
3345 </description>
3346 </property>
3347 <property>
3348 <name>hive.server2.authentication.pam.services</name>
3349 <value/>
3350 <description>
3351 List of the underlying pam services that should be used when auth type is PAM
3352 A file with the same name must exist in /etc/pam.d
3353 </description>
3354 </property>
3355 <property>
3356 <name>hive.server2.enable.doAs</name>
3357 <value>true</value>
3358 <description>
3359 Setting this property to true will have HiveServer2 execute
3360 Hive operations as the user making the calls to it.
3361 </description>
3362 </property>
3363 <property>
3364 <name>hive.server2.table.type.mapping</name>
3365 <value>CLASSIC</value>
3366 <description>
3367 Expects one of [classic, hive].
3368 This setting reflects how HiveServer2 will report the table types for JDBC and other
3369 client implementations that retrieve the available tables and supported table types
3370 HIVE : Exposes Hive's native table types like MANAGED_TABLE, EXTERNAL_TABLE, VIRTUAL_VIEW
3371 CLASSIC : More generic types like TABLE and VIEW
3372 </description>
3373 </property>
3374 <property>
3375 <name>hive.server2.session.hook</name>
3376 <value/>
3377 <description/>
3378 </property>
3379 <property>
3380 <name>hive.server2.use.SSL</name>
3381 <value>false</value>
3382 <description>Set this to true for using SSL encryption in HiveServer2.</description>
3383 </property>
3384 <property>
3385 <name>hive.server2.keystore.path</name>
3386 <value/>
3387 <description>SSL certificate keystore location.</description>
3388 </property>
3389 <property>
3390 <name>hive.server2.keystore.password</name>
3391 <value/>
3392 <description>SSL certificate keystore password.</description>
3393 </property>
3394 <property>
3395 <name>hive.server2.map.fair.scheduler.queue</name>
3396 <value>true</value>
3397 <description>
3398 If the YARN fair scheduler is configured and HiveServer2 is running in non-impersonation mode,
3399 this setting determines the user for fair scheduler queue mapping.
3400 If set to true (default), the logged-in user determines the fair scheduler queue
3401 for submitted jobs, so that map reduce resource usage can be tracked by user.
3402 If set to false, all Hive jobs go to the 'hive' user's queue.
3403 </description>
3404 </property>
3405 <property>
3406 <name>hive.server2.builtin.udf.whitelist</name>
3407 <value/>
3408 <description>
3409 Comma separated list of builtin udf names allowed in queries.
3410 An empty whitelist allows all builtin udfs to be executed. The udf black list takes precedence over udf white list
3411 </description>
3412 </property>
3413 <property>
3414 <name>hive.server2.builtin.udf.blacklist</name>
3415 <value/>
3416 <description>Comma separated list of udfs names. These udfs will not be allowed in queries. The udf black list takes precedence over udf white list</description>
3417 </property>
3418 <property>
3419 <name>hive.security.command.whitelist</name>
3420 <value>set,reset,dfs,add,list,delete,reload,compile</value>
3421 <description>Comma separated list of non-SQL Hive commands users are authorized to execute</description>
3422 </property>
3423 <property>
3424 <name>hive.server2.session.check.interval</name>
3425 <value>6h</value>
3426 <description>
3427 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
3428 The time should be bigger than or equal to 3000 msec.
3429 The check interval for session/operation timeout, which can be disabled by setting to zero or negative value.
3430 </description>
3431 </property>
3432 <property>
3433 <name>hive.server2.idle.session.timeout</name>
3434 <value>7d</value>
3435 <description>
3436 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
3437 Session will be closed when it's not accessed for this duration, which can be disabled by setting to zero or negative value.
3438 </description>
3439 </property>
3440 <property>
3441 <name>hive.server2.idle.operation.timeout</name>
3442 <value>5d</value>
3443 <description>
3444 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
3445 Operation will be closed when it's not accessed for this duration of time, which can be disabled by setting to zero value.
3446 With positive value, it's checked for operations in terminal state only (FINISHED, CANCELED, CLOSED, ERROR).
3447 With negative value, it's checked for all of the operations regardless of state.
3448 </description>
3449 </property>
3450 <property>
3451 <name>hive.server2.idle.session.check.operation</name>
3452 <value>true</value>
3453 <description>
3454 Session will be considered to be idle only if there is no activity, and there is no pending operation.
3455 This setting takes effect only if session idle timeout (hive.server2.idle.session.timeout) and checking
3456 (hive.server2.session.check.interval) are enabled.
3457 </description>
3458 </property>
3459 <property>
3460 <name>hive.conf.restricted.list</name>
3461 <value>hive.security.authenticator.manager,hive.security.authorization.manager,hive.users.in.admin.role</value>
3462 <description>Comma separated list of configuration options which are immutable at runtime</description>
3463 </property>
3464 <property>
3465 <name>hive.multi.insert.move.tasks.share.dependencies</name>
3466 <value>false</value>
3467 <description>
3468 If this is set all move tasks for tables/partitions (not directories) at the end of a
3469 multi-insert query will only begin once the dependencies for all these move tasks have been
3470 met.
3471 Advantages: If concurrency is enabled, the locks will only be released once the query has
3472 finished, so with this config enabled, the time when the table/partition is
3473 generated will be much closer to when the lock on it is released.
3474 Disadvantages: If concurrency is not enabled, with this disabled, the tables/partitions which
3475 are produced by this query and finish earlier will be available for querying
3476 much earlier. Since the locks are only released once the query finishes, this
3477 does not apply if concurrency is enabled.
3478 </description>
3479 </property>
3480 <property>
3481 <name>hive.exec.infer.bucket.sort</name>
3482 <value>false</value>
3483 <description>
3484 If this is set, when writing partitions, the metadata will include the bucketing/sorting
3485 properties with which the data was written if any (this will not overwrite the metadata
3486 inherited from the table if the table is bucketed/sorted)
3487 </description>
3488 </property>
3489 <property>
3490 <name>hive.exec.infer.bucket.sort.num.buckets.power.two</name>
3491 <value>false</value>
3492 <description>
3493 If this is set, when setting the number of reducers for the map reduce task which writes the
3494 final output files, it will choose a number which is a power of two, unless the user specifies
3495 the number of reducers to use using mapred.reduce.tasks. The number of reducers
3496 may be set to a power of two, only to be followed by a merge task meaning preventing
3497 anything from being inferred.
3498 With hive.exec.infer.bucket.sort set to true:
3499 Advantages: If this is not set, the number of buckets for partitions will seem arbitrary,
3500 which means that the number of mappers used for optimized joins, for example, will
3501 be very low. With this set, since the number of buckets used for any partition is
3502 a power of two, the number of mappers used for optimized joins will be the least
3503 number of buckets used by any partition being joined.
3504 Disadvantages: This may mean a much larger or much smaller number of reducers being used in the
3505 final map reduce job, e.g. if a job was originally going to take 257 reducers,
3506 it will now take 512 reducers, similarly if the max number of reducers is 511,
3507 and a job was going to use this many, it will now use 256 reducers.
3508 </description>
3509 </property>
3510 <property>
3511 <name>hive.optimize.listbucketing</name>
3512 <value>false</value>
3513 <description>Enable list bucketing optimizer. Default value is false so that we disable it by default.</description>
3514 </property>
3515 <property>
3516 <name>hive.server.read.socket.timeout</name>
3517 <value>10s</value>
3518 <description>
3519 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
3520 Timeout for the HiveServer to close the connection if no response from the client. By default, 10 seconds.
3521 </description>
3522 </property>
3523 <property>
3524 <name>hive.server.tcp.keepalive</name>
3525 <value>true</value>
3526 <description>Whether to enable TCP keepalive for the Hive Server. Keepalive will prevent accumulation of half-open connections.</description>
3527 </property>
3528 <property>
3529 <name>hive.decode.partition.name</name>
3530 <value>false</value>
3531 <description>Whether to show the unquoted partition names in query results.</description>
3532 </property>
3533 <property>
3534 <name>hive.execution.engine</name>
3535 <value>mr</value>
3536 <description>
3537 Expects one of [mr, tez, spark].
3538 Chooses execution engine. Options are: mr (Map reduce, default), tez (hadoop 2 only), spark
3539 </description>
3540 </property>
3541 <property>
3542 <name>hive.jar.directory</name>
3543 <value/>
3544 <description>
3545 This is the location hive in tez mode will look for to find a site wide
3546 installed hive instance.
3547 </description>
3548 </property>
3549 <property>
3550 <name>hive.user.install.directory</name>
3551 <value>hdfs:///user/</value>
3552 <description>
3553 If hive (in tez mode only) cannot find a usable hive jar in "hive.jar.directory",
3554 it will upload the hive jar to "hive.user.install.directory/user.name"
3555 and use it to run queries.
3556 </description>
3557 </property>
3558 <property>
3559 <name>hive.vectorized.execution.enabled</name>
3560 <value>false</value>
3561 <description>
3562 This flag should be set to true to enable vectorized mode of query execution.
3563 The default value is false.
3564 </description>
3565 </property>
3566 <property>
3567 <name>hive.vectorized.execution.reduce.enabled</name>
3568 <value>true</value>
3569 <description>
3570 This flag should be set to true to enable vectorized mode of the reduce-side of query execution.
3571 The default value is true.
3572 </description>
3573 </property>
3574 <property>
3575 <name>hive.vectorized.execution.reduce.groupby.enabled</name>
3576 <value>true</value>
3577 <description>
3578 This flag should be set to true to enable vectorized mode of the reduce-side GROUP BY query execution.
3579 The default value is true.
3580 </description>
3581 </property>
3582 <property>
3583 <name>hive.vectorized.execution.mapjoin.native.enabled</name>
3584 <value>true</value>
3585 <description>
3586 This flag should be set to true to enable native (i.e. non-pass through) vectorization
3587 of queries using MapJoin.
3588 The default value is true.
3589 </description>
3590 </property>
3591 <property>
3592 <name>hive.vectorized.execution.mapjoin.native.multikey.only.enabled</name>
3593 <value>false</value>
3594 <description>
3595 This flag should be set to true to restrict use of native vector map join hash tables to
3596 the MultiKey in queries using MapJoin.
3597 The default value is false.
3598 </description>
3599 </property>
3600 <property>
3601 <name>hive.vectorized.execution.mapjoin.minmax.enabled</name>
3602 <value>false</value>
3603 <description>
3604 This flag should be set to true to enable vector map join hash tables to
3605 use max / max filtering for integer join queries using MapJoin.
3606 The default value is false.
3607 </description>
3608 </property>
3609 <property>
3610 <name>hive.vectorized.execution.mapjoin.overflow.repeated.threshold</name>
3611 <value>-1</value>
3612 <description>
3613 The number of small table rows for a match in vector map join hash tables
3614 where we use the repeated field optimization in overflow vectorized row batch for join queries using MapJoin.
3615 A value of -1 means do use the join result optimization. Otherwise, threshold value can be 0 to maximum integer.
3616 </description>
3617 </property>
3618 <property>
3619 <name>hive.vectorized.execution.mapjoin.native.fast.hashtable.enabled</name>
3620 <value>false</value>
3621 <description>
3622 This flag should be set to true to enable use of native fast vector map join hash tables in
3623 queries using MapJoin.
3624 The default value is false.
3625 </description>
3626 </property>
3627 <property>
3628 <name>hive.vectorized.groupby.checkinterval</name>
3629 <value>100000</value>
3630 <description>Number of entries added to the group by aggregation hash before a recomputation of average entry size is performed.</description>
3631 </property>
3632 <property>
3633 <name>hive.vectorized.groupby.maxentries</name>
3634 <value>1000000</value>
3635 <description>
3636 Max number of entries in the vector group by aggregation hashtables.
3637 Exceeding this will trigger a flush irrelevant of memory pressure condition.
3638 </description>
3639 </property>
3640 <property>
3641 <name>hive.vectorized.groupby.flush.percent</name>
3642 <value>0.1</value>
3643 <description>Percent of entries in the group by aggregation hash flushed when the memory threshold is exceeded.</description>
3644 </property>
3645 <property>
3646 <name>hive.typecheck.on.insert</name>
3647 <value>true</value>
3648 <description>This property has been extended to control whether to check, convert, and normalize partition value to conform to its column type in partition operations including but not limited to insert, such as alter, describe etc.</description>
3649 </property>
3650 <property>
3651 <name>hive.hadoop.classpath</name>
3652 <value/>
3653 <description>
3654 For Windows OS, we need to pass HIVE_HADOOP_CLASSPATH Java parameter while starting HiveServer2
3655 using "-hiveconf hive.hadoop.classpath=%HIVE_LIB%".
3656 </description>
3657 </property>
3658 <property>
3659 <name>hive.rpc.query.plan</name>
3660 <value>false</value>
3661 <description>Whether to send the query plan via local resource or RPC</description>
3662 </property>
3663 <property>
3664 <name>hive.compute.splits.in.am</name>
3665 <value>true</value>
3666 <description>Whether to generate the splits locally or in the AM (tez only)</description>
3667 </property>
3668 <property>
3669 <name>hive.prewarm.enabled</name>
3670 <value>false</value>
3671 <description>Enables container prewarm for Tez (Hadoop 2 only)</description>
3672 </property>
3673 <property>
3674 <name>hive.prewarm.numcontainers</name>
3675 <value>10</value>
3676 <description>Controls the number of containers to prewarm for Tez (Hadoop 2 only)</description>
3677 </property>
3678 <property>
3679 <name>hive.stageid.rearrange</name>
3680 <value>none</value>
3681 <description>
3682 Expects one of [none, idonly, traverse, execution].
3683 </description>
3684 </property>
3685 <property>
3686 <name>hive.explain.dependency.append.tasktype</name>
3687 <value>false</value>
3688 <description/>
3689 </property>
3690 <property>
3691 <name>hive.counters.group.name</name>
3692 <value>HIVE</value>
3693 <description>The name of counter group for internal Hive variables (CREATED_FILE, FATAL_ERROR, etc.)</description>
3694 </property>
3695 <property>
3696 <name>hive.server2.tez.default.queues</name>
3697 <value/>
3698 <description>
3699 A list of comma separated values corresponding to YARN queues of the same name.
3700 When HiveServer2 is launched in Tez mode, this configuration needs to be set
3701 for multiple Tez sessions to run in parallel on the cluster.
3702 </description>
3703 </property>
3704 <property>
3705 <name>hive.server2.tez.sessions.per.default.queue</name>
3706 <value>1</value>
3707 <description>
3708 A positive integer that determines the number of Tez sessions that should be
3709 launched on each of the queues specified by "hive.server2.tez.default.queues".
3710 Determines the parallelism on each queue.
3711 </description>
3712 </property>
3713 <property>
3714 <name>hive.server2.tez.initialize.default.sessions</name>
3715 <value>false</value>
3716 <description>
3717 This flag is used in HiveServer2 to enable a user to use HiveServer2 without
3718 turning on Tez for HiveServer2. The user could potentially want to run queries
3719 over Tez without the pool of sessions.
3720 </description>
3721 </property>
3722 <property>
3723 <name>hive.support.quoted.identifiers</name>
3724 <value>column</value>
3725 <description>
3726 Expects one of [none, column].
3727 Whether to use quoted identifier. 'none' or 'column' can be used.
3728 none: default(past) behavior. Implies only alphaNumeric and underscore are valid characters in identifiers.
3729 column: implies column names can contain any character.
3730 </description>
3731 </property>
3732 <property>
3733 <name>hive.support.sql11.reserved.keywords</name>
3734 <value>true</value>
3735 <description>
3736 This flag should be set to true to enable support for SQL2011 reserved keywords.
3737 The default value is true.
3738 </description>
3739 </property>
3740 <property>
3741 <name>hive.users.in.admin.role</name>
3742 <value/>
3743 <description>
3744 Comma separated list of users who are in admin role for bootstrapping.
3745 More users can be added in ADMIN role later.
3746 </description>
3747 </property>
3748 <property>
3749 <name>hive.compat</name>
3750 <value>0.12</value>
3751 <description>
3752 Enable (configurable) deprecated behaviors by setting desired level of backward compatibility.
3753 Setting to 0.12:
3754 Maintains division behavior: int / int = double
3755 </description>
3756 </property>
3757 <property>
3758 <name>hive.convert.join.bucket.mapjoin.tez</name>
3759 <value>false</value>
3760 <description>
3761 Whether joins can be automatically converted to bucket map joins in hive
3762 when tez is used as the execution engine.
3763 </description>
3764 </property>
3765 <property>
3766 <name>hive.exec.check.crossproducts</name>
3767 <value>true</value>
3768 <description>Check if a plan contains a Cross Product. If there is one, output a warning to the Session's console.</description>
3769 </property>
3770 <property>
3771 <name>hive.localize.resource.wait.interval</name>
3772 <value>5000ms</value>
3773 <description>
3774 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
3775 Time to wait for another thread to localize the same resource for hive-tez.
3776 </description>
3777 </property>
3778 <property>
3779 <name>hive.localize.resource.num.wait.attempts</name>
3780 <value>5</value>
3781 <description>The number of attempts waiting for localizing a resource in hive-tez.</description>
3782 </property>
3783 <property>
3784 <name>hive.tez.auto.reducer.parallelism</name>
3785 <value>false</value>
3786 <description>
3787 Turn on Tez' auto reducer parallelism feature. When enabled, Hive will still estimate data sizes
3788 and set parallelism estimates. Tez will sample source vertices' output sizes and adjust the estimates at runtime as
3789 necessary.
3790 </description>
3791 </property>
3792 <property>
3793 <name>hive.tez.max.partition.factor</name>
3794 <value>2.0</value>
3795 <description>When auto reducer parallelism is enabled this factor will be used to over-partition data in shuffle edges.</description>
3796 </property>
3797 <property>
3798 <name>hive.tez.min.partition.factor</name>
3799 <value>0.25</value>
3800 <description>
3801 When auto reducer parallelism is enabled this factor will be used to put a lower limit to the number
3802 of reducers that tez specifies.
3803 </description>
3804 </property>
3805 <property>
3806 <name>hive.tez.dynamic.partition.pruning</name>
3807 <value>true</value>
3808 <description>
3809 When dynamic pruning is enabled, joins on partition keys will be processed by sending
3810 events from the processing vertices to the Tez application master. These events will be
3811 used to prune unnecessary partitions.
3812 </description>
3813 </property>
3814 <property>
3815 <name>hive.tez.dynamic.partition.pruning.max.event.size</name>
3816 <value>1048576</value>
3817 <description>Maximum size of events sent by processors in dynamic pruning. If this size is crossed no pruning will take place.</description>
3818 </property>
3819 <property>
3820 <name>hive.tez.dynamic.partition.pruning.max.data.size</name>
3821 <value>104857600</value>
3822 <description>Maximum total data size of events in dynamic pruning.</description>
3823 </property>
3824 <property>
3825 <name>hive.tez.smb.number.waves</name>
3826 <value>0.5</value>
3827 <description>The number of waves in which to run the SMB join. Account for cluster being occupied. Ideally should be 1 wave.</description>
3828 </property>
3829 <property>
3830 <name>hive.tez.exec.print.summary</name>
3831 <value>false</value>
3832 <description>Display breakdown of execution steps, for every query executed by the shell.</description>
3833 </property>
3834 <property>
3835 <name>hive.tez.exec.inplace.progress</name>
3836 <value>true</value>
3837 <description>Updates tez job execution progress in-place in the terminal.</description>
3838 </property>
3839 <property>
3840 <name>hive.spark.client.future.timeout</name>
3841 <value>60s</value>
3842 <description>
3843 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
3844 Timeout for requests from Hive client to remote Spark driver.
3845 </description>
3846 </property>
3847 <property>
3848 <name>hive.spark.job.monitor.timeout</name>
3849 <value>60s</value>
3850 <description>
3851 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is sec if not specified.
3852 Timeout for job monitor to get Spark job state.
3853 </description>
3854 </property>
3855 <property>
3856 <name>hive.spark.client.connect.timeout</name>
3857 <value>1000ms</value>
3858 <description>
3859 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
3860 Timeout for remote Spark driver in connecting back to Hive client.
3861 </description>
3862 </property>
3863 <property>
3864 <name>hive.spark.client.server.connect.timeout</name>
3865 <value>90000ms</value>
3866 <description>
3867 Expects a time value with unit (d/day, h/hour, m/min, s/sec, ms/msec, us/usec, ns/nsec), which is msec if not specified.
3868 Timeout for handshake between Hive client and remote Spark driver. Checked by both processes.
3869 </description>
3870 </property>
3871 <property>
3872 <name>hive.spark.client.secret.bits</name>
3873 <value>256</value>
3874 <description>Number of bits of randomness in the generated secret for communication between Hive client and remote Spark driver. Rounded down to the nearest multiple of 8.</description>
3875 </property>
3876 <property>
3877 <name>hive.spark.client.rpc.threads</name>
3878 <value>8</value>
3879 <description>Maximum number of threads for remote Spark driver's RPC event loop.</description>
3880 </property>
3881 <property>
3882 <name>hive.spark.client.rpc.max.size</name>
3883 <value>52428800</value>
3884 <description>Maximum message size in bytes for communication between Hive client and remote Spark driver. Default is 50MB.</description>
3885 </property>
3886 <property>
3887 <name>hive.spark.client.channel.log.level</name>
3888 <value/>
3889 <description>Channel logging level for remote Spark driver. One of {DEBUG, ERROR, INFO, TRACE, WARN}.</description>
3890 </property>
3891 <property>
3892 <name>hive.spark.client.rpc.sasl.mechanisms</name>
3893 <value>DIGEST-MD5</value>
3894 <description>Name of the SASL mechanism to use for authentication.</description>
3895 </property>
3896 <property>
3897 <name>hive.reorder.nway.joins</name>
3898 <value>true</value>
3899 <description>Runs reordering of tables within single n-way join (i.e.: picks streamtable)</description>
3900 </property>
3901 <property>
3902 <name>hive.log.every.n.records</name>
3903 <value>0</value>
3904 <description>
3905 Expects value bigger than 0.
3906 If value is greater than 0 logs in fixed intervals of size n rather than exponentially.
3907 </description>
3908 </property>
3909</configuration>