Reynold Xin created SPARK-12400:
-----------------------------------
Summary: Avoid writing a shuffle file if a partition has no output
(empty)
Key: SPARK-12400
URL: https://issues.apache.org/jira/browse/SPARK-12400
Project: Spark
Issue Type: Improvement
Components: Shuffle
Reporter: Reynold Xin
A Spark user was asking for automatic setting of # reducers. When I pushed for
more, it turned out the problem for them is that 200 creates too many files,
when most partitions are empty.
It seems like a simple thing we can do is to avoid creating shuffle files if a
partition is empty.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
