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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-843) Message communication overhead between master aggregation and vertex computation supersteps
Date Tue, 14 Jan 2014 23:47:20 GMT

    [ https://issues.apache.org/jira/browse/HAMA-843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13871384#comment-13871384
] 

Hudson commented on HAMA-843:
-----------------------------

SUCCESS: Integrated in Hama-Nightly-for-Hadoop-2.x #148 (See [https://builds.apache.org/job/Hama-Nightly-for-Hadoop-2.x/148/])
HAMA-843: Message communication overhead between master aggregation and vertex computation
supersteps (edwardyoon: rev 1557891)
* /hama/trunk/CHANGES.txt
* /hama/trunk/graph/src/main/java/org/apache/hama/graph/GraphJob.java
* /hama/trunk/graph/src/main/java/org/apache/hama/graph/GraphJobRunner.java


> Message communication overhead between master aggregation and vertex computation supersteps
> -------------------------------------------------------------------------------------------
>
>                 Key: HAMA-843
>                 URL: https://issues.apache.org/jira/browse/HAMA-843
>             Project: Hama
>          Issue Type: Improvement
>          Components: graph
>    Affects Versions: 0.6.3
>            Reporter: Edward J. Yoon
>            Assignee: Edward J. Yoon
>             Fix For: 0.7.0
>
>         Attachments: HAMA-843.patch
>
>
> Within doAggregationUpdates() method, we sends unconsumed messages to next superstep
using send() method. This is huge overhead.
> {code}
>     // in case we need to sync, we need to replay the messages that already
>     // are added to the queue. This prevents loosing messages when using
>     // aggregators.
>     if (firstVertexMessage != null) {
>       peer.send(peer.getPeerName(), firstVertexMessage);
>     }
>     GraphJobMessage msg = null;
>     while ((msg = peer.getCurrentMessage()) != null) {
>       peer.send(peer.getPeerName(), msg);
>     }
> {code}
> Once HAMA-842 is done, we can get rid of this overhead.



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