GitHub user dafrista opened a pull request:
https://github.com/apache/spark/pull/13382
[SPARK-5581][Core] When writing sorted map output file, avoid open / â¦
â¦close between each partition
## What changes were proposed in this pull request?
Replace commitAndClose with separate commit and close to avoid opening and
closing
the file between partitions.
## How was this patch tested?
Run existing unit tests, add a few unit tests regarding reverts.
Observed a ~20% reduction in total time in tasks on stages with shuffle
writes to many partitions.
@JoshRosen
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dafrista/spark separatecommit-master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13382.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #13382
----
commit 360cc54047428b9ffe76b2e9005ea5a3bb35e610
Author: Brian Cho <[email protected]>
Date: 2016-05-17T04:38:43Z
[SPARK-5581][Core] When writing sorted map output file, avoid open / close
between each partition
## What changes were proposed in this pull request?
Replace commitAndClose with separate commit and close to avoid opening and
closing
the file between partitions.
## How was this patch tested?
Run existing unit tests, add a few unit tests regarding reverts.
Observed a ~20% reduction in total time in tasks on stages with shuffle
writes to many partitions.
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