GitHub user SaintBacchus opened a pull request:
https://github.com/apache/spark/pull/5240
[SPARK-6584][CORE]Provide ExecutorPrefixTaskLocation to support the rdd
which can be aware of partition's executor location.
The function `RDD.getPreferredLocations` can only be set the host awareness
prefer locations.
If some RDD wants to be scheduled by executor(such as `BlockRDD`), spark
can do nothing for this.
So I want to provide `ExecutorPrefixTaskLocation` to support the rdd which
can be aware of partition's executor location. This mechanism can avoid data
transfor in the case of many executor in the same host.
I think it's very useful especially for `SparkStreaming` since the
`Receriver` save data into the `BlockMange`r and then become a `BlockRDD`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/SaintBacchus/spark ExecutorPrefixTaskLocation
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/5240.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 #5240
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commit 271240d31113311aab0024f44f885fd821ace1a2
Author: huangzhaowei <[email protected]>
Date: 2015-03-28T09:56:36Z
Provide ExecutorPrefixTaskLocation to support the rdd which can be aware of
partition's executor location.
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