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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-582) Block reports should be processed offline
Date Fri, 06 Oct 2006 21:08:19 GMT
Block reports should be processed offline
-----------------------------------------

                 Key: HADOOP-582
                 URL: http://issues.apache.org/jira/browse/HADOOP-582
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.7.0
            Reporter: Owen O'Malley
         Assigned To: Sameer Paranjpye


The namenode's handling of block reports should be done from a batch queue instead of while
the rpc call from the client is waiting. I'd propose:

 void blockReport(DataNodeRegistration, Block[]) throws IOException;

instead of passing back obsolete blocks they can be handed back on later heartbeat.

The blockReport calls should just queue the registration and list of blocks and there should
be a thread that processes the block reports when possible. 

The goal is to prevent rpc timeouts and therefore retransmissions of the block lists.

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