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From "Suraj Menon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HAMA-636) Confined recovery
Date Mon, 10 Sep 2012 04:42:08 GMT

     [ https://issues.apache.org/jira/browse/HAMA-636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Suraj Menon updated HAMA-636:

    Issue Type: Sub-task  (was: New Feature)
        Parent: HAMA-505
> Confined recovery
> -----------------
>                 Key: HAMA-636
>                 URL: https://issues.apache.org/jira/browse/HAMA-636
>             Project: Hama
>          Issue Type: Sub-task
>          Components: bsp core, messaging
>            Reporter: Edward J. Yoon
> "Confined recovery" mentioned in Pregel paper can be used to improve the cost and latency
of recovery. 
> In addition to the existing HDFS checkpoints,1) the tasks log outgoing messages to local
filesystem for each superstep (See disk queue). When a task fails, 2) it reverts to the last
checkpoint. 3) Other tasks re-send messages sent to failed task at each superstep occurring
after the last checkpoint.

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