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  1. Hadoop HDFS
  2. HDFS-6524

chooseDataNode decides retry times considering with block replica number

    Details

    • Type: Improvement
    • Status: Patch Available
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: 3.0.0-alpha1
    • Fix Version/s: None
    • Component/s: hdfs-client
    • Labels:

      Description

      Currently the chooseDataNode() does retry with the setting: dfsClientConf.maxBlockAcquireFailures, which by default is 3 (DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_DEFAULT = 3), it would be better having another option, block replication factor. One cluster with only two block replica setting, or using Reed-solomon encoding solution with one replica factor. It helps to reduce the long tail latency.

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            • Assignee:
              xieliang007 Liang Xie
              Reporter:
              xieliang007 Liang Xie
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              • Created:
                Updated: