GitHub user yangyangyyy opened a pull request:
https://github.com/apache/spark/pull/17697
enable configurable reducer count in topByKey()
## What changes were proposed in this pull request?
in the topByKey() call, provide a configurable partition count. without
this, currently topByKey() results in only 16 reducers even if you have a 100GB
input size
## How was this patch tested?
use existing unit tests
Please review http://spark.apache.org/contributing.html before opening a
pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yangyangyyy/spark master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17697.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 #17697
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commit 09d66432787488b3672f22e03c492e558bf45019
Author: Yang Yang <[email protected]>
Date: 2017-04-20T06:49:30Z
enable configurable reducer count in topByKey()
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