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https://issues.apache.org/jira/browse/FLINK-1514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14352256#comment-14352256
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ASF GitHub Bot commented on FLINK-1514:
---------------------------------------

Github user vasia commented on the pull request:

    https://github.com/apache/flink/pull/408#issuecomment-77774172
  
    Regarding the rest of the comments:
    - shall we change the SumFunction, ApplyFunction, etc. to have 2 versions, 
i.e. single-abstract-interface and rich? If yes, it should be a good idea to go 
the same for vertex-centric.
    - the run/create slit is indeed for configuration, aggregators and 
broadcast sets. We did the same for vertex-centric in #402. I do like your api 
proposal more though, I guess we should change both :)


> [Gelly] Add a Gather-Sum-Apply iteration method
> -----------------------------------------------
>
>                 Key: FLINK-1514
>                 URL: https://issues.apache.org/jira/browse/FLINK-1514
>             Project: Flink
>          Issue Type: New Feature
>          Components: Gelly
>    Affects Versions: 0.9
>            Reporter: Vasia Kalavri
>            Assignee: Daniel Bali
>
> This will be a method that implements the GAS computation model, but without 
> the "scatter" step. The phases can be mapped into the following steps inside 
> a delta iteration:
> gather: a map on each < srcVertex, edge, trgVertex > that produces a partial 
> value
> sum: a reduce that combines the partial values
> apply: join with vertex set to update the vertex values using the results of 
> sum and the previous state.



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