Github user idanz commented on the pull request:
https://github.com/apache/spark/pull/4094#issuecomment-70443024
I see,
I don't want to repeat old discussions so to be more pragmatic, the real
problem for me is to set the partition size when using sparksql.
My cluster uses 128MB blocks for hdfs, and when I use hiveContext.sql, it
just takes the partitions in that size.
This causes memory issues so I wanted to use smaller partitions.
However the only way I found to do that requires setting mapred.map.tasks
which is an undocumented setting.
Would you suggest opening a new ticket for this requirement?
Thanks
Here's some links to prior discussions of this:
- https://issues.apache.org/jira/browse/SPARK-822
- mesos/spark#718 <https://github.com/mesos/spark/pull/718>
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