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

["Sankar Hariappan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-16901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-16901 started by Sankar Hariappan.
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> 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
>              Labels: DR, replication
>             Fix For: 3.0.0
>
>
> Currently, if a CopyTask 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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