GitHub user rxin opened a pull request:
https://github.com/apache/spark/pull/1191
[SPARK-2253] Aggregator: Disable partial aggregation automatically when
reduction factor is low
TODOs
- [ ] Figure out the config option names
- [ ] Decide whether we want to create a new interface or just reuse the
existing. If user applications use the existing combineValuesByKey with the
assumption the output key will be unique, this could potentially break their
applications (however we never really documented what the behavior of this
function should be)
- [ ] Implement the same functionality for the external spilling case
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rxin/spark partialAggCore
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/1191.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 #1191
----
commit 6a7d0aaf9a9b5676ecd5ebaeaeb1d210c2d90c30
Author: Reynold Xin <r...@apache.org>
Date: 2014-06-24T07:40:21Z
[SPARK-2253] Aggregator: Disable partial aggregation automatically when
reduction factor is low.
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