hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4049) plugin for generic shuffle service
Date Wed, 02 Jan 2013 11:54:22 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13542093#comment-13542093
] 

Alejandro Abdelnur commented on MAPREDUCE-4049:
-----------------------------------------------

Avner, thanks for the clarification, I've got confused as JIRA emailed an 'updated patch'
message.

On #1, the ShuffleConsumerPlugin should be in this JIRA.
On #2, I assume the trunk version does not (will not) have a Map side because the ShuffleHandler
is already pluggable. Given that, the Map side (ShuffleProvider) seems an artifact of the
backport of this JIRA. Because of that, I think is OK to have it here.

I assume you are working on updating the attached Hadoop-1 patch, following some comments
on the current Hadoop-1 patch:

* Not having a ShuffleProviderPlugin in the TaskTracker should be reason to fail the TaskTracker
at startup, no?
* We should follow the same pattern as in trunk:
** Define an interface instead of an abstract class for ShuffleConsumerPlugin, with init(),
fetchOutput(), createKVIterator(), getMergeThrowable() methods.
** Define a Context for ShuffleConsumerPlugin initialization
** Use ReflectionUtil.newInstance() in ReducerTask to instantiate the ShuffleConsumerPlugin
** visibility/stability Annotations are missing

                
> plugin for generic shuffle service
> ----------------------------------
>
>                 Key: MAPREDUCE-4049
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4049
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          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: 3.0.0
>
>         Attachments: HADOOP-1.x.y.patch, Hadoop Shuffle Plugin Design.rtf, 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]

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message