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• Default Value: false
• Added In: Hive 0.8.0 with HIVE-2056
• Removed In:  Hive Hive 0.9.0 by HIVE-2621 (see hive.multigroupby.singlereducer)

Whether to optimize multi group by query to generate a single M/R job plan. If the multi group by query has common group by keys, it will be optimized to generate a single M/R job. (This configuration property was removed in release 0.9.0.)

hive.multigroupby.singlereducer

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• Default Value: true
• Added In: Hive 0.4.0
• Opt outRemoved In: Hive 0.13.0 with HIVE-4113

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• Default Value: false
• Added In: Hive 0.5.0
• Removed inRemoved In: Hive 0.13.0 with HIVE-4518

Whether Hive should periodically update task progress counters during execution. Enabling this allows task progress to be monitored more closely in the job tracker, but may impose a performance penalty. This flag is automatically set to true for jobs with hive.exec.dynamic.partition set to true. (This configuration property was removed in release 0.13.0.)

hive.counters.group.name

• Default Value: HIVE
• Added In: Hive 0.13.0 with HIVE-4518

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• Default Value: true
• Added In: Hive 0.8.1
• Removed inRemoved In: Hive 0.10 with HIVE-2585

Controls whether to connect to remote metastore server or open a new metastore server in Hive Client JVM. As of Hive 0.10 this is no longer used. Instead if hive.metastore.uris is set then remote mode is assumed otherwise local.

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• Default Value: false
• Added In: Hive 0.6.0
• Removed In: Hive 0.10.0 with HIVE-3338

In new Hadoop versions, the parent directory must be set while creating a HAR. Because this functionality is hard to detect with just version numbers, this configuration variable needs needed to be set manually in Hive releases 0.6.0 through 0.9.0.

Locking

See Hive Concurrency Model for general information about locking.

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