Name |
Default Value |
Added In |
Description |
---|---|---|---|
mapred.reduce.tasks |
-1 |
|
The default number of reduce tasks per job. Typically set to a prime close to the number of available hosts. Ignored when mapred.job.tracker is "local". Hadoop set this to 1 by default, whereas hive uses -1 as its default value. By setting this property to -1, Hive will automatically figure out what should be the number of reducers. |
hive.region.properties |
(empty) |
? |
The default filesystem and jobtracker for a region. |