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From "Sankar Hariappan (JIRA)" <>
Subject [jira] [Created] (HIVE-16901) Distcp optimization - One distcp per ReplCopyTask
Date Wed, 14 Jun 2017 18:49:00 GMT
Sankar Hariappan created HIVE-16901:

             Summary: Distcp optimization - One distcp per ReplCopyTask 
                 Key: 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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