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From "Alessandro Presta (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-293) Should aggregators be checkpointed?
Date Wed, 22 Aug 2012 11:14:38 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13439414#comment-13439414
] 

Alessandro Presta commented on GIRAPH-293:
------------------------------------------

If there's no merge conflict, you don't need to post the new one.
                
> Should aggregators be checkpointed?
> -----------------------------------
>
>                 Key: GIRAPH-293
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-293
>             Project: Giraph
>          Issue Type: Bug
>            Reporter: Alessandro Presta
>            Assignee: Maja Kabiljo
>         Attachments: GIRAPH-293.patch, GIRAPH-293.patch
>
>
> As I understand, we don't include aggregators in checkpoints because they are kept in
the Zookeeper.
> One of our bootcampers is working on fixing TestManualCheckpoint, which currently involves
starting a new job from a checkpoint from a previous job*.
> If this is a functionality we want going forward, then persistent aggregators should
be checkpointed.
> [*] That test relies on the fact that either aggregators are checkpointed or they are
always reset at each superstep. None of these is happening, but the error cancels out with
the fact that we are not actually resuming from a checkpoint, but re-running the job from
scratch.

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