[jira] [Commented] (MAPREDUCE-4049) plugin for generic shuffle service

["Avner BenHanoch (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13509684#comment-13509684 ] 

Avner BenHanoch commented on MAPREDUCE-4049:
--------------------------------------------

Hi Arun,

Kindly thank you for all the help.

Regarding set methods in ShuffleContext.  Do we really need that.  As I see it, all members are only inited at once in the CTOR and never changed again.  As a result I defined them all as *private final*.  
Hence, *please clarify if you ask me to remove the final*, and provide set methods instead?

( In case you prefer the current private final style, please let me know if you still want your other comment regarding un-replacing member fields in Shuffle.java )


Thanks,
  Avner
                
> 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: 1.0.3, 1.1.0, 2.0.0-alpha, 3.0.0
>            Reporter: Avner BenHanoch
>            Assignee: Avner BenHanoch
>              Labels: merge, plugin, rdma, shuffle
>             Fix For: trunk
>
>         Attachments: HADOOP-1.x.y.patch, Hadoop Shuffle Plugin Design.rtf, mapreduce-4049.patch, mapreduce-4049.patch, mapreduce-4049.patch, mapreduce-4049.patch
>
>
> 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)
> # I am providing link for downloading UDA - Mellanox's open source plugin that implements generic shuffle service using RDMA and levitated merge.  Note: At this phase, the code is in C++ through JNI and you should consider it as beta only.  Still, it can serve anyone that wants to implement or contribute to levitated merge. (Please be advised that levitated merge is mostly suit in very fast networks) - [http://www.mellanox.com/content/pages.php?pg=products_dyn&product_family=144&menu_section=69]

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