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Date: Mon, 24 Sep 2012 16:40:07 +1100 (NCT)
From: "Yuesheng Hu (JIRA)" <jira@apache.org>
To: dev@hama.apache.org
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Subject: [jira] [Commented] (HAMA-647) Make the  input spliter robustly
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    [ https://issues.apache.org/jira/browse/HAMA-647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13461608#comment-13461608 ] 

Yuesheng Hu commented on HAMA-647:
----------------------------------

mvn build successfully, but still need test on cluster environment. I will keep going with this.
                
> Make the  input spliter robustly
> --------------------------------
>
>                 Key: HAMA-647
>                 URL: https://issues.apache.org/jira/browse/HAMA-647
>             Project: Hama
>          Issue Type: Improvement
>          Components: bsp core
>    Affects Versions: 0.5.0, 0.6.0
>            Reporter: Yuesheng Hu
>            Assignee: Yuesheng Hu
>            Priority: Critical
>             Fix For: 0.6.0
>
>         Attachments: HAMA-647.patch
>
>
> Currently, the spliter in FileInputFormat is based on the Mapreduce's spliter. But, Hama is different from Mapreduce, Hama's task can not be  pended until the slot becomes free.  So, the current spliter is not suitable for Hama. When input file is small, it may be ok, but when input is  very large, the number of splits will be very large too, even our cluster is powerful enough to handle the input. More details, please see the comments.

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