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https://issues.apache.org/jira/browse/MAPREDUCE-4049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269739#comment-13269739
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Mariappan Asokan commented on MAPREDUCE-4049:
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Hi Avner,
Thanks for your comments. I can make the following classes public with a
caveat that the InterfaceStability is "Unstable" in the annotation:
{{EventFetcher}} and {{ShuffleScheduler.}} I already made the class
{{MapOutput}} "public abstract". I did not touch {{ShuffleClientMetrics.}} Do
you mind making the change as part of your patch? Please let me know.
I can post the patch files corresponding to the current trunk as well as for
hadoop-2 branch. I need some time to test my patches(may be a couple of
weeks.) Yes, for hadoop-1.x you can go ahead with your original patch since I
am not posting any patch for 1.x.
If you are working with a committer to push your changes, perhaps I can work
with him/her to push my contributions as well. Please let me know.
Thanks.
Asokan
> plugin for generic shuffle service
> ----------------------------------
>
> Key: MAPREDUCE-4049
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4049
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: performance, task, tasktracker
> Affects Versions: 1.1.0, 1.0.3, 2.0.0, 3.0.0
> Reporter: Avner BenHanoch
> Labels: merge, plugin, rdma, shuffle
> Attachments: HADOOP-1.0.2.patch, HADOOP-1.0.x.patch,
> HADOOP-1.0.x.patch, Hadoop Shuffle Consumer Plugin TLD.rtf, Hadoop Shuffle
> Provider Plugin TLD.rtf, MAPREDUCE-4049-branch-1.0.2.patch, mapred-site.xml,
> mapred.diff, src.tgz, test.diff
>
>
> Support generic shuffle service as set of two plugins: ShuffleProvider &
> ShuffleConsumer.
> This will satisfy the following needs:
> # Better shuffle and merge performance. For example: we are working on
> shuffle plugin that performs shuffle over RDMA in fast networks (10gE, 40gE,
> or Infiniband) instead of using the current HTTP shuffle. Based on the fast
> RDMA shuffle, the plugin can also utilize a suitable merge approach during
> the intermediate merges. Hence, getting much better performance.
> # Satisfy MAPREDUCE-3060 - generic shuffle service for avoiding hidden
> dependency of NodeManager with a specific version of mapreduce shuffle
> (currently targeted to 0.24.0).
> References:
> # Hadoop Acceleration through Network Levitated Merging, by Prof. Weikuan Yu
> from Auburn University with others,
> [http://pasl.eng.auburn.edu/pubs/sc11-netlev.pdf]
> # I am attaching 2 documents with suggested Top Level Design for both plugins
> (currently, based on 1.0 branch)
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