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Date: Tue, 11 Sep 2012 19:12:08 +1100 (NCT)
From: "Thomas Jungblut (JIRA)" <jira@apache.org>
To: hama-dev@incubator.apache.org
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Subject: [jira] [Commented] (HAMA-557) Implement Checkpointing service in
 Hama
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    [ https://issues.apache.org/jira/browse/HAMA-557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13452815#comment-13452815 ] 

Thomas Jungblut commented on HAMA-557:
--------------------------------------

bq.Should we merge "bsp.ft.enabled" and "bsp.checkpoint.enabled" into one?

+1
                
> Implement Checkpointing service in Hama
> ---------------------------------------
>
>                 Key: HAMA-557
>                 URL: https://issues.apache.org/jira/browse/HAMA-557
>             Project: Hama
>          Issue Type: Sub-task
>          Components: bsp core
>    Affects Versions: 0.6.0
>            Reporter: Suraj Menon
>            Assignee: Suraj Menon
>             Fix For: 0.6.0
>
>         Attachments: HAMA-505-557-610-611-v1.patch, HAMA-505-557-610-611-v2.patch, HAMA-557-ft-framework.patch
>
>
> Implement checkpointing service in Apache Hama. My patches for HAMA-533 and HAMA-534 are blocked on this.
> - Checkpointing should be done as messages are either sent or received. I prefer while receiving messages, as we can achieve some parallelism with asynchronous messages. Please comment if you differ.
> - BSPMaster should hold the checkpoint status for each task. Checkpoint status includes superstep count and file information for which checkpointing is complete
> - MessageManager should notify Checkpointer of a new message at BSPPeer.
> - Implement/Reuse MessageBundle class as splitClass in BSPPeerImpl for recovery in initInput.

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