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  1. Hadoop Common
  2. HADOOP-1766

Merging Block and BlockInfo classes on name-node.

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.14.0
    • Fix Version/s: 0.15.0
    • Component/s: None
    • Labels:
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      Description

      In current implementation

      • BlocksMap references BlockInfo
      • INode references Block
      • BlockInfo contains a reference to the corresponding Block

      It would be better to incorporate Block into BlockInfo and reference the latter everywhere in name-node structures.
      This saves 24 bytes per block on a 64-bit jvm as stated in HADOOP-1687 (5).
      I retained the Block class as a structure for external (client and data-node) communication.

        Attachments

        1. blockInfo.patch
          2 kB
          Konstantin Shvachko

          Issue Links

          is part of

          Improvement - An improvement or enhancement to an existing feature or task. HADOOP-1687 Name-node memory size estimates and optimization proposal.

          • Major - Major loss of function.
          • Closed

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              People

              • Assignee:
                shv Konstantin Shvachko
                Reporter:
                shv Konstantin Shvachko
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                Dates

                • Created:
                  Updated:
                  Resolved: