Hadoop HDFS
  1. Hadoop HDFS
  2. HDFS-3544

Ability to use SimpleRegeratingCode to fix missing blocks

    Details

    • Type: Improvement Improvement
    • Status: Open
    • Priority: Major Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: contrib/raid
    • Labels:
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      Description

      ReedSolomon encoding (n, k) has n storage nodes and can tolerate n-k failures. Regenerating a block needs to access k blocks. This is a problem when n and k are large. Instead, we can use simple regenerating codes (n, k, f) that does first does ReedSolomon (n,k) and then does XOR with f stripe size. Then, a single disk failure needs to access only f nodes and f can be very small.

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            • Assignee:
              Unassigned
              Reporter:
              dhruba borthakur
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              • Created:
                Updated:

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