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https://issues.apache.org/jira/browse/HADOOP-12975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Elliott Clark updated HADOOP-12975:
-----------------------------------
Attachment: HADOOP-12975v0.patch
Also based upon HADOOP-12973
> Add jitter to DU'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
>
>
> 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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