Page History

...

When hive.merge.mapfiles, hive.merge.mapredfiles or hive.merge.tezfiles is enabled while writing a table with ORC file format, enabling this config will do stripe level fast merge for small ORC files. Note that enabling this config will not honor padding tolerance config (hive.exec.orc.block.padding.tolerance).

hive.orc.row.index.stride.dictionary.check

• Default Value: true
• Added In: Hive 0.14.0 with HIVE-7832

If enabled dictionary check will happen after first row index stride (default 10000 rows) else dictionary check will happen before writing first stripe. In both cases, the decision to use dictionary or not will be retained thereafter.

MetaStore

hive.metastore.local

...