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https://issues.apache.org/jira/browse/HADOOP-14407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16015158#comment-16015158
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Omkar Aradhya K S commented on HADOOP-14407:
--------------------------------------------
{quote}
Thanks for the updated patch Omkar Aradhya K S, are you guys still looking into
setting input and output buffer to different size? Or any chance we need to do
that in the future?
{quote}
[~yzhangal] Thanks for checking the patch. As explained in the previous commit,
we don't need to do this change since even a small copybiffersize can give huge
boos in performance.
{quote}
Somehow your submitting the patch did not trigger a jenkins test, maybe there
is an infra issue.
{quote}
Thanks for pointing this out. Yes, even I waited for quite some time, but there
was no result! Do I need any additional permissions for this?
Also, can you point out how exactly you triggered the build? May be I missed
something?
> 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, 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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