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From "Alessandro Presta (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (GIRAPH-224) Server-side combiner
Date Wed, 04 Jul 2012 15:18:34 GMT

     [ https://issues.apache.org/jira/browse/GIRAPH-224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alessandro Presta updated GIRAPH-224:
-------------------------------------

    Attachment: GIRAPH-224-3.patch

Previous patch had a bug: I wasn't putting the combined messages back in transientMessages.

The reason why the test seemed to work is because our unit tests use Hadoop RPC by default,
and I had no idea this was Netty-specific code.
                
> Server-side combiner
> --------------------
>
>                 Key: GIRAPH-224
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-224
>             Project: Giraph
>          Issue Type: Improvement
>          Components: bsp
>            Reporter: Alessandro Presta
>            Assignee: Alessandro Presta
>         Attachments: GIRAPH-224-1.patch, GIRAPH-224-2.patch, GIRAPH-224-3.patch, GIRAPH-224.patch
>
>
> Currently, if a VertexCombiner is defined in the Configuration, we use it on the client
in order to optimize bandwidth and memory usage.
> On the server side, we can easily benefit in terms of memory by exploiting the combiner
once more.

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