GitHub user brkyvz opened a pull request:
https://github.com/apache/spark/pull/9373
[SPARK-11419][STREAMING] Par recovery
The support for closing WriteAheadLog files after writes was just merged
in. Closing every file after a write is a very expensive operation as it
creates many small files on S3. It's not necessary to enable it on HDFS anyway.
However, when you have many small files on S3, recovery takes very long. In
addition, files start stacking up pretty quickly, and deletes may not be able
to keep up, therefore deletes can also be parallelized.
This PR adds support for the two parallelization steps mentioned above, in
addition to a couple more failures I encountered during recovery.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/brkyvz/spark par-recovery
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9373.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 #9373
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commit 573b657bca5a77297cafbde489ba380b3372c81c
Author: Burak Yavuz <brk...@gmail.com>
Date: 2015-10-29T20:54:02Z
progress
commit 655f4bff61f1ffa21565c73eb0fe732c8ffada3e
Author: Burak Yavuz <brk...@gmail.com>
Date: 2015-10-29T23:53:23Z
ready for PR
commit 06da0d1389f658a1eb3e9aaaf1750fd7ad85567a
Author: Burak Yavuz <brk...@gmail.com>
Date: 2015-10-30T06:12:41Z
ready for PR
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