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Posted to common-issues@hadoop.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2018/04/24 20:50:06 UTC
[jira] [Commented] (HADOOP-14405) Fix performance regression due to
incorrect use of DataChecksum
[ https://issues.apache.org/jira/browse/HADOOP-14405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16450706#comment-16450706 ]
Hudson commented on HADOOP-14405:
---------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #14057 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/14057/])
HADOOP-14405. Fix performance regression due to incorrect use of (xyao: rev f47199ee4a6cda8b835a034c6765b63680effdd2)
* (edit) hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/DataChecksum.java
> 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: 2.8.0, 3.0.0-alpha1
> Reporter: LiXin Ge
> Assignee: LiXin Ge
> Priority: Major
> Fix For: 2.9.0, 3.0.0-alpha4, 2.8.2
>
> 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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