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Posted to dev@hama.apache.org by "Edward J. Yoon (Commented) (JIRA)" <ji...@apache.org> on 2012/03/09 06:58:00 UTC

[jira] [Commented] (HAMA-531) Data re-partitioning in BSPJobClient

    [ https://issues.apache.org/jira/browse/HAMA-531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13225870#comment-13225870 ] 

Edward J. Yoon commented on HAMA-531:
-------------------------------------

In my opinion, each task should load the locally assigned data and transfer the data with optimized way across the network.

                
> 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
>
> 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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