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  1. Hadoop HDFS
  2. HDFS-14591

NameNode should move the replicas to the correct storages after the storage policy is changed.

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
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      Description

      Our Xiaomi HDFS has a cluster storaging both HOT and COLD data. We have a backgroud process searching all the files to find those that are not accessed for a period of time. Then we set them to COLD and start a mover to move the replicas. After moving, all the replicas are consistent with the storage policy.
      It's a natural idea to let the NameNode handle the move.

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              • Assignee:
                LiJinglun Jinglun
                Reporter:
                LiJinglun Jinglun
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                • Created:
                  Updated:
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