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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HAMA-636) Confined recovery
Date Mon, 10 Sep 2012 04:14:07 GMT
Edward J. Yoon created HAMA-636:
-----------------------------------

             Summary: Confined recovery
                 Key: HAMA-636
                 URL: https://issues.apache.org/jira/browse/HAMA-636
             Project: Hama
          Issue Type: New Feature
          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 workers re-send messages sent to failed worker at each superstep occurring after
the last checkpoint.

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