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  1. Hadoop HDFS
  2. HDFS-1171

RaidNode should fix missing blocks directly on Data Node

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    Details

    • Type: Task
    • Status: Resolved
    • Priority: Major
    • Resolution: Invalid
    • Affects Version/s: 0.20.1
    • Fix Version/s: None
    • Component/s: contrib/raid
    • Labels:
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      Description

      RaidNode currently does not fix missing blocks. The missing blocks have to be fixed manually.

      This task proposes that recovery be more automated:
      1. RaidNode periodically fetches a list of corrupt files from the NameNode
      2. If the corrupt files has a RAID parity file, RaidNode identifies missing block(s) in the file and recomputes the block(s) using the parity file and other good blocks
      3. RaidNode sends the generated block contents to a DataNode
      a. RaidNode chooses a DataNode with the most available space to send the block.

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            • Assignee:
              rvadali Ramkumar Vadali
              Reporter:
              rvadali Ramkumar Vadali
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              • Created:
                Updated:
                Resolved: