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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12975) Add jitter to CachingGetSpaceUsed's thread
Date Fri, 17 Jun 2016 00:16:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15335051#comment-15335051
] 

Hudson commented on HADOOP-12975:
---------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #9973 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/9973/])
HADOOP-12975. Add jitter to CachingGetSpaceUsed's thread (Elliott Clark (cmccabe: rev bf780406f2b30e627bdf36ac07973f6931f81106)
* hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/GetSpaceUsed.java
* hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/DU.java
* hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CachingGetSpaceUsed.java
* hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestDU.java
* hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/WindowsGetSpaceUsed.java


> Add jitter to CachingGetSpaceUsed's thread
> ------------------------------------------
>
>                 Key: HADOOP-12975
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12975
>             Project: Hadoop Common
>          Issue Type: Sub-task
>    Affects Versions: 2.8.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>             Fix For: 2.8.0
>
>         Attachments: HADOOP-12975v0.patch, HADOOP-12975v1.patch, HADOOP-12975v2.patch,
HADOOP-12975v3.patch, HADOOP-12975v4.patch, HADOOP-12975v5.patch, HADOOP-12975v6.patch
>
>
> Running DU across lots of disks is very expensive and running all of the processes at
the same time creates a noticeable IO spike. We should add some jitter.



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