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https://issues.apache.org/jira/browse/YARN-2618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14239086#comment-14239086
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Karthik Kambatla commented on YARN-2618:
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In the context of this JIRA, vdisks is always 1. So, the value of vdisks per
container doesn't have any meaning here :)
In the context of YARN-2139, vdisks captures both (1) proportion of disk
resources and (2) potential parallelism. The proportion of disk resources is
only through enforcement. As Bikas suggested on the umbrella JIRA and I
responded, the potential parallelism (a.k.a number of spindles) can be achieved
through the number of local directories assigned to the container.
> Avoid over-allocation of disk resources
> ---------------------------------------
>
> Key: YARN-2618
> URL: https://issues.apache.org/jira/browse/YARN-2618
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Wei Yan
> Assignee: Wei Yan
> Attachments: YARN-2618-1.patch, YARN-2618-2.patch
>
>
> Subtask of YARN-2139.
> This should include
> - Add API support for introducing disk I/O as the 3rd type resource.
> - NM should report this information to the RM
> - RM should consider this to avoid over-allocation
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