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  1. Hadoop HDFS
  2. HDFS-7285 Erasure Coding Support inside HDFS
  3. HDFS-8813

Erasure Coding: Client no need to decode missing parity blocks

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    Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: HDFS-7285
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      Assume 6+3 schema.
      Assume data block #2 is missing, then InputStream tries to read parity block #6.
      Assume parity block #6 is missing too. And InputStream successfully reads parity block #7.
      Then begin to decode.

      Currently InputStream will decode #2 and #6. But client(user) only need #2. The parity block #6 will be disposed.

      The improvement is we only decode #2.

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            • Assignee:
              walter.k.su Walter Su
              Reporter:
              walter.k.su Walter Su
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              • Created:
                Updated:
                Resolved: