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From "Vasia Kalavri (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-1514) [Gelly] Add a Gather-Sum-Apply iteration method
Date Wed, 11 Feb 2015 11:38:12 GMT
Vasia Kalavri created FLINK-1514:

             Summary: [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
    Affects Versions: 0.9
            Reporter: Vasia Kalavri

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

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