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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. |