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https://issues.apache.org/jira/browse/HAMA-515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13221928#comment-13221928
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ChiaHung Lin commented on HAMA-515:
-----------------------------------
If this is for alternative barrier sync issue, probably you would like to
consider embedding a failure detector inside the bsp master so that master can
determine the status of GroomServer, which in turns harnesses bsp tasks.
If I understand correctly, zookeeper achieves synchrony with the aid of failure
detection (But I could be wrong because I did not look into it).
> Counter should be synchronized by sync()
> ----------------------------------------
>
> Key: HAMA-515
> URL: https://issues.apache.org/jira/browse/HAMA-515
> Project: Hama
> Issue Type: New Feature
> Affects Versions: 0.4.0
> Reporter: Thomas Jungblut
> Priority: Minor
> Fix For: 0.5.0
>
>
> We should synchronize the counters in all tasks after a sync() call.
> Then someone can use it for flow control. E.G. graph related algorithms, to
> get the number of globally updated vertices.
> Two options to solve this:
> - Sync the whole stuff over RPC from the BSPMaster
> - Use Zookeeper for counter handling
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