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Posted to dev@hive.apache.org by "Sankar Hariappan (JIRA)" <ji...@apache.org> on 2017/06/14 18:49:00 UTC

[jira] [Created] (HIVE-16901) Distcp optimization - One distcp per ReplCopyTask

Sankar Hariappan created HIVE-16901:
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             Summary: Distcp optimization - One distcp per ReplCopyTask 
                 Key: HIVE-16901
                 URL: https://issues.apache.org/jira/browse/HIVE-16901
             Project: Hive
          Issue Type: Sub-task
          Components: Hive, repl
    Affects Versions: 2.1.0
            Reporter: Sankar Hariappan
            Assignee: Sankar Hariappan
             Fix For: 3.0.0


Currently, if a ReplCopyTask is created to copy a list of files, then distcp is invoked for each and every file. Instead, need to pass the list of source files to be copied to distcp tool which basically copies the files in parallel and hence gets lot of performance gain.

If the copy of list of files fail, then traverse the destination directory to see which file is missing and checksum mismatches, then trigger copy of those files one by one.



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