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https://issues.apache.org/jira/browse/FLINK-7019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Greg Hogan closed FLINK-7019.
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Resolution: Implemented
master: d0cc2c178714987ba23998486651791d04a5beb1
> Rework parallelism in Gelly algorithms and examples
> ---------------------------------------------------
>
> Key: FLINK-7019
> URL: https://issues.apache.org/jira/browse/FLINK-7019
> Project: Flink
> Issue Type: Sub-task
> Components: Gelly
> Affects Versions: 1.4.0
> Reporter: Greg Hogan
> Assignee: Greg Hogan
> Priority: Minor
> Fix For: 1.4.0
>
>
> Flink job parallelism is set with {{ExecutionConfig#setParallelism}} or when
> {{-p}} on the command-line. The Gelly algorithms {{JaccardIndex}},
> {{AdamicAdar}}, {{TriangleListing}}, and {{ClusteringCoefficient}} have
> intermediate operators which generate output quadratic in the size of input.
> These algorithms may need to be run with a high parallelism but doing so for
> all operations is wasteful. Thus was introduced "little parallelism".
> This can be simplified by moving the parallelism parameter to the new common
> base class with the rule-of-thumb to use the algorithm parallelism for all
> normal (small output) operators. The asymptotically large operators will
> default to the job parallelism, as will the default algorithm parallelism.
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