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  1. Hadoop Common
  2. HADOOP-13163

Reuse pre-computed filestatus in Distcp-CopyMapper

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 2.8.0
    • Fix Version/s: 2.8.0, 3.0.0-alpha1
    • Component/s: tools/distcp
    • Labels:
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      Description

      https://github.com/apache/hadoop/blob/af942585a108d70e0946f6dd4c465a54d068eabf/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/CopyMapper.java#L185

      targetStatus is already computed and it can be reused in checkUpdate() function. This wouldn't be a major issue in NN/HDFS, but in the case of S3 getFileStatus calls can be expensive.

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            • Assignee:
              rajesh.balamohan Rajesh Balamohan
              Reporter:
              rajesh.balamohan Rajesh Balamohan
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              • Created:
                Updated:
                Resolved: