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https://issues.apache.org/jira/browse/YARN-3820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14605915#comment-14605915
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Srikanth Kandula commented on YARN-3820:
----------------------------------------

Copied [~chris.douglas] comment to 3820 as well.

[~chris.douglas] The intention with forcedRead is to allow the caller to decide 
whether or not a fresh read of the /proc is needed. If set to false, the code 
responds with the previously read readings. This is just to amortize cost of 
polling...

> Collect disks usages on the node
> --------------------------------
>
>                 Key: YARN-3820
>                 URL: https://issues.apache.org/jira/browse/YARN-3820
>             Project: Hadoop YARN
>          Issue Type: New Feature
>    Affects Versions: 3.0.0
>            Reporter: Robert Grandl
>            Assignee: Robert Grandl
>              Labels: yarn-common, yarn-util
>         Attachments: YARN-3820-1.patch, YARN-3820-2.patch, YARN-3820-3.patch, 
> YARN-3820-4.patch
>
>
> In this JIRA we propose to collect disks usages on a node. This JIRA is part 
> of a larger effort of monitoring resource usages on the nodes. 



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