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From "Milind Bhandarkar (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2911) Hamster: Hadoop And Mpi on the same cluSTER
Date Wed, 11 Apr 2012 18:47:18 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13251834#comment-13251834
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Milind Bhandarkar commented on MAPREDUCE-2911:
----------------------------------------------

I mostly agree with Arun (except for HoD part). Having a low-latency communication mechanism
in Hadoop world is valuable. Applications on this platform will not be typical HPC applications,
but mostly iterative machine-learning applications that require crunching more input data,
and produce models (small output data). Many are using sub-optimal ways of launching iterative
computations on Hadoop anyway, and having even an inefficient MPI launch will be more efficient
than what people resort to today.

Arun, HoD is now viable. More later :-)
                
> Hamster: Hadoop And Mpi on the same cluSTER
> -------------------------------------------
>
>                 Key: MAPREDUCE-2911
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2911
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: mrv2
>    Affects Versions: 0.23.0
>         Environment: All Unix-Environments
>            Reporter: Milind Bhandarkar
>            Assignee: Ralph H Castain
>             Fix For: 0.24.0
>
>   Original Estimate: 336h
>  Remaining Estimate: 336h
>
> MPI is commonly used for many machine-learning applications. OpenMPI (http://www.open-mpi.org/)
is a popular BSD-licensed version of MPI. In the past, running MPI application on a Hadoop
cluster was achieved using Hadoop Streaming (http://videolectures.net/nipsworkshops2010_ye_gbd/),
but it was kludgy. After the resource-manager separation from JobTracker in Hadoop, we have
all the tools needed to make MPI a first-class citizen on a Hadoop cluster. I am currently
working on the patch to make MPI an application-master. Initial version of this patch will
be available soon (hopefully before September 10.) This jira will track the development of
Hamster: The application master for MPI.

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