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https://issues.apache.org/jira/browse/HADOOP-14405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Masatake Iwasaki moved HDFS-11765 to HADOOP-14405:
--------------------------------------------------
Affects Version/s: (was: 3.0.0-alpha1)
(was: 2.8.0)
2.8.0
3.0.0-alpha1
Target Version/s: (was: 2.8.1)
Component/s: (was: native)
(was: performance)
performance
native
Key: HADOOP-14405 (was: HDFS-11765)
Project: Hadoop Common (was: Hadoop HDFS)
> Fix:Performance regression due to incorrect use of DataChecksum
> ---------------------------------------------------------------
>
> Key: HADOOP-14405
> URL: https://issues.apache.org/jira/browse/HADOOP-14405
> Project: Hadoop Common
> Issue Type: Bug
> Components: native, performance
> Affects Versions: 3.0.0-alpha1, 2.8.0
> Reporter: LiXin Ge
> Assignee: LiXin Ge
> Attachments: HDFS-11765.patch
>
>
> Recently I have upgraded my Hadoop version from 2.6 to 3.0, and I find that
> the write performance decreased by 13%. After some days comparative analysis,
> It's seems introduced by HADOOP-10865.
> Since James Thomas have done the work that native checksum can run against
> byte[] arrays instead of just against byte buffers, we may use native method
> preferential because it runs faster than others.
> [~szetszwo] and [~iwasakims] could you take a look at this to see if it make
> bad effect on your benchmark test? [~tlipcon] could you help to see if I have
> make mistakes in this patch?
> thanks!
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