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From "Milind Bhandarkar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4049) plugin for generic shuffle service
Date Fri, 25 May 2012 23:57:23 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13283826#comment-13283826
] 

Milind Bhandarkar commented on MAPREDUCE-4049:
----------------------------------------------

Luke,

the original Auburn Univ work was done (with Mellanox support) in version 0.20.x. However,
Avner ported it to 1.0.x, which is the patch attached here. We have been testing it at Greenplum
(with both default shuffle plugin, and Mellanox's Unstructured Data Accelerator (UDA) plugin,)
and haven't found any issues so far.
                
> 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-alpha, 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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