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