[jira] [Commented] (GIRAPH-293) Should aggregators be checkpointed?

["Avery Ching (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GIRAPH-293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13468279#comment-13468279 ] 

Avery Ching commented on GIRAPH-293:
------------------------------------

+1, this is great.
                
> 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, GIRAPH-293.patch, 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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