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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12975) Add jitter to CachingGetSpaceUsed's thread
Date Thu, 14 Apr 2016 17:21:25 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Elliott Clark updated HADOOP-12975:
-----------------------------------
    Summary: Add jitter to CachingGetSpaceUsed's thread  (was: Add jitter to DU's thread)

> 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
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>         Attachments: HADOOP-12975v0.patch, HADOOP-12975v1.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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