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  1. Hadoop Common
  2. HADOOP-5124

A few optimizations to FsNamesystem#RecentInvalidateSets

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.0.0, 0.21.0
    • Component/s: None
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      This jira proposes a few optimization to FsNamesystem#RecentInvalidateSets:
      1. when removing all replicas of a block, it does not traverse all nodes in the map. Instead it traverse only the nodes that the block is located.
      2. When dispatching blocks to datanodes in ReplicationMonitor. It randomly chooses a predefined number of datanodes and dispatches blocks to those datanodes. This strategy provides fairness to all datanodes. The current strategy always starts from the first datanode.

        Attachments

        1. HADOOP-5124-branch-0.20-security.patch
          8 kB
          Jitendra Nath Pandey
        2. optimizeInvalidate2-0.20.2.patch
          5 kB
          Jeff Whiting
        3. optimizeInvalidate2.patch
          7 kB
          Hairong Kuang
        4. optimizeInvalidate1.patch
          8 kB
          Hairong Kuang
        5. optimizeInvalidate.patch
          4 kB
          Hairong Kuang

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              • Assignee:
                hairong Hairong Kuang
                Reporter:
                hairong Hairong Kuang
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                • Created:
                  Updated:
                  Resolved: