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  1. Hadoop HDFS
  2. HDFS-9440

Improve BlockPlacementPolicyDefault's to be able to rebalance when picking of excess replicas

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    Details

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

      The test case used in HDFS-9313 and HDFS-9314 identified the limitation of excess replica picking. If the current replicas are on

      {SSD(rack 1), DISK(rack 3), DISK(rack 3), DISK(rack 3)}

      and the storage policy changes to HOT_STORAGE_POLICY_ID, BlockPlacementPolicyDefault's won't be able to delete SSD replica, because deleting the SSD on rack 1 will violate the block placement policy.

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              • Assignee:
                Unassigned
                Reporter:
                xiaochen Xiao Chen
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                Dates

                • Created:
                  Updated: