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From "Thomas Jungblut (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-444) All tasks should be finished at the last iteration
Date Mon, 26 Sep 2011 07:36:26 GMT

    [ https://issues.apache.org/jira/browse/HAMA-444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13114510#comment-13114510
] 

Thomas Jungblut commented on HAMA-444:
--------------------------------------

In my opinion this is up to the user. 
It is called barrier sync and it is necessary that every task is living until the end of computation.

But we can offer that a task can opt out from a computation. Don't know how we can do this
with ZooKeeper, but we should make this configurable.

> All tasks should be finished at the last iteration
> --------------------------------------------------
>
>                 Key: HAMA-444
>                 URL: https://issues.apache.org/jira/browse/HAMA-444
>             Project: Hama
>          Issue Type: Bug
>          Components: bsp
>    Affects Versions: 0.3.0
>            Reporter: Edward J. Yoon
>             Fix For: 0.4.0
>
>
> Each BSP task can be finished differently with their each conditions. In this case, all
tasks should be finished at the last iteration or comparison logic of barrier should be fixed
to avoid hang problem.

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