GitHub user li-zhihui opened a pull request:
https://github.com/apache/spark/pull/900
submit stage after (configured ratio of) executors have been registered
Because creating TaskSetManager and registering executors are asynchronous,
in most situation, early stages' tasks run without preferred locality.
A simple solution is sleeping few seconds in application, so that executors
have enough time to register.
The PR add 2 configuration properties to make DAGScheduler submit stage
after a few of executors have been registered.
# submit stage only after successfully registered executors arrived the
ratio, default value 0
spark.executor.registeredRatio = 0.8
# whatever registeredRatio is arrived, submit stage after the
maxRegisteredWaitingTime(millisecond), default value 10000
spark.executor.maxRegisteredWaitingTime = 5000
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/li-zhihui/spark master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/900.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 #900
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commit a9ee1cb3efbcb58b59f66b4ddecb515609b51b86
Author: li-zhihui <[email protected]>
Date: 2014-05-28T05:35:13Z
submit stage after (configured ratio of) executors have been registered
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