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From "Omkar Aradhya K S (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-14407) DistCp - Introduce a configurable copy buffer size
Date Thu, 18 May 2017 07:16:04 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-14407?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Omkar Aradhya K S updated HADOOP-14407:
---------------------------------------
    Attachment: HADOOP-14407.003.patch

new patch with cosmetic changes

> DistCp - Introduce a configurable copy buffer size
> --------------------------------------------------
>
>                 Key: HADOOP-14407
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14407
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: tools/distcp
>    Affects Versions: 2.9.0
>            Reporter: Omkar Aradhya K S
>            Assignee: Omkar Aradhya K S
>             Fix For: 2.9.0, 3.0.0-alpha3
>
>         Attachments: HADOOP-14407.001.patch, HADOOP-14407.002.patch, HADOOP-14407.002.patch,
HADOOP-14407.003.patch, TotalTime-vs-CopyBufferSize.jpg
>
>
> Currently, the RetriableFileCopyCommand has a fixed copy buffer size of just 8KB. We
have noticed in our performance tests that with bigger buffer sizes we saw upto ~3x performance
boost. Hence, making the copy buffer size a configurable setting via the new parameter <copybuffersize>.



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