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From "Thomas Jungblut (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-531) Data re-partitioning in BSPJobClient
Date Tue, 22 May 2012 05:25:41 GMT

    [ https://issues.apache.org/jira/browse/HAMA-531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13280737#comment-13280737
] 

Thomas Jungblut commented on HAMA-531:
--------------------------------------

I think we should delay this a bit. I'm going to commit this partitioning for graph algorithms
now since this is our major feature.
                
> Data re-partitioning in BSPJobClient
> ------------------------------------
>
>                 Key: HAMA-531
>                 URL: https://issues.apache.org/jira/browse/HAMA-531
>             Project: Hama
>          Issue Type: Improvement
>            Reporter: Edward J. Yoon
>            Assignee: Thomas Jungblut
>         Attachments: HAMA-531_1.patch, HAMA-531_2.patch, HAMA-531_final.patch
>
>
> The re-partitioning the data is a very expensive operation. By the way, currently, we
processes read/write operations sequentially using HDFS api in BSPJobClient from client-side.
This causes potential too many open files error, contains HDFS overheads, and shows slow performance.
> We have to find another way to re-partitioning data.

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