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This is an HDFS root directory under which Hive's REPL DUMP command will operate, creating dumps to replicate along to other warehouses.
Blobstore (i.e Amazon S3)
A set of configurations were added to enable read/write performance improvements when working with tables stored on blobstore systems, such as Amazon S3.
hive.blobstore.supported.schemes
- Default value: s3,s3a,s3n
- Added In: Hive 2.2 with HIVE-14270
List of supported blobstore schemes that Hive uses to apply special read/write performance improvements.
hive.blobstore.optimizations.enabled
- Default value: true
- Added In: Hive 2.2 with HIVE-15121
This parameter is a global variable that enables a number of optimizations when running on blobstores.
Some of the optimizations, such as hive.blobstore.use.blobstore.as.scratchdir, won't be used if this variable is set to false.
hive.blobstore.use.blobstore.as.scratchdir
- Default value: false
- Added In: Hive 2.2 with HIVE-14270
Set this to true to enable the use of scratch directories directly on blob storage systems (it may cause performance penalties).
hive.exec.input.listing.max.threads
- Default value: 0 (disabled)
- Added In: Hive 2.2 with HIVE-15881
Set this to a maximum number of threads that Hive will use to list file information form file systems, such as file size and number of files per table (recommended > 1 for blobstore).
Test Properties
Note: This is an incomplete list of configuration properties used by developers when running Hive tests. For other test properties, search for "hive.test." in hive-default.xml.template or HiveConf.java.
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