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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-761) Improvement for GraphJobMessage comparation operation
Date Sun, 09 Jun 2013 21:19:20 GMT

    [ https://issues.apache.org/jira/browse/HAMA-761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13679166#comment-13679166

Edward J. Yoon commented on HAMA-761:

Hi, have you tried to benchmark?
> Improvement for GraphJobMessage comparation operation
> -----------------------------------------------------
>                 Key: HAMA-761
>                 URL: https://issues.apache.org/jira/browse/HAMA-761
>             Project: Hama
>          Issue Type: Improvement
>          Components: graph
>    Affects Versions: 0.6.1
>            Reporter: MaoYuan Xian
>            Assignee: MaoYuan Xian
> Currently, GraphJobMessage comparation opertion depends on the default comparator (org.apache.hadoop.io.WritableComparator
used), which has to read out all GraphJobMessage message (including vertexId and vertexValue)
when does the comparation. 
> Since lots of comparation operations happen in graph computing, this limitation makes
a performance downgrade.

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