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https://issues.apache.org/jira/browse/FLINK-1514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15346160#comment-15346160
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Vasia Kalavri commented on FLINK-1514:
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Hi [~michael], tis GSA implementation is a variation of the [Powergraph
abstraction | https://www.eecs.harvard.edu/cs261/papers/gonzalez-2012.pdf]. You
can read more details about how it works in the [Gelly docs |
https://ci.apache.org/projects/flink/flink-docs-master/apis/batch/libs/gelly.html#gather-sum-apply-iterations].
> [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
> Fix For: 0.9
>
>
> 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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