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Chooses execution engine. Options are: mr (Map reduce, default) or tez (Tez execution, for Hadoop 2 only).

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Default file format for CREATE TABLE statement. Options are TextFile, SequenceFile, RCFileRCfile, and OrcORC. Users can explicitly say CREATE TABLE ... STORED AS TEXTFILE|SEQUENCEFILE|RCFILE|ORC to override.

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Whether to check file format or not when loading data files.

hive.orc.splits.include.file.footer

• Default Value: false
• Added In: Hive 0.13.0 with HIVE-4660 and HIVE-6128

If turned on, splits generated by ORC will include metadata about the stripes in the file. This data is read remotely (from the client or HiveServer2 machine) and sent to all the tasks.

hive.orc.cache.stripe.details.size

• Default Value: 10000
• Added In: Hive 0.13.0 with HIVE-4660 and HIVE-6128

Cache size for keeping meta information about ORC splits cached in the client.

hive.orc.compute.splits.num.threads

• Default Value: 10
• Added In: Hive 0.13.0 with HIVE-4660 and HIVE-6128

How many threads ORC should use to create splits in parallel.

hive.map.aggr

• Default Value: true
• Added In:

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