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https://issues.apache.org/jira/browse/HAMA-838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13862989#comment-13862989
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Anastasis Andronidis commented on HAMA-838:
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I agree, but I am worried with setup() registration. Every vertex will try to
register the aggregators, this means that we will have to run lookups to ignore
the requests if aggregators already exist (don't forget the dynamic addition of
vertices). Also, maybe we stack with concurrency problems if a multithreaded
version?
> Add custom aggregators
> ----------------------
>
> Key: HAMA-838
> URL: https://issues.apache.org/jira/browse/HAMA-838
> Project: Hama
> Issue Type: Improvement
> Components: graph
> Affects Versions: 0.6.3
> Reporter: Anastasis Andronidis
> Assignee: Anastasis Andronidis
> Labels: features, patch
> Fix For: 0.7.0
>
> Attachments: HAMA-838.patch
>
>
> This is a patch that adds custom aggregators.
> I also wrote an example of how you can use them.
> Implementation features:
> * Register the aggregators by name.
> * Custom aggregators are skipped when there are no messages to process
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