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https://issues.apache.org/jira/browse/YARN-2791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14277979#comment-14277979
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Swapnil Daingade commented on YARN-2791:
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Hi [~kasha]] and [~vinodkv]],
Went over the latest design doc for YARN-2139 and posted my comments.
> Add Disk as a resource for scheduling
> -------------------------------------
>
> Key: YARN-2791
> URL: https://issues.apache.org/jira/browse/YARN-2791
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: scheduler
> Affects Versions: 2.5.1
> Reporter: Swapnil Daingade
> Assignee: Yuliya Feldman
> Attachments: DiskDriveAsResourceInYARN.pdf
>
>
> Currently, the number of disks present on a node is not considered a factor
> while scheduling containers on that node. Having large amount of memory on a
> node can lead to high number of containers being launched on that node, all
> of which compete for I/O bandwidth. This multiplexing of I/O across
> containers can lead to slower overall progress and sub-optimal resource
> utilization as containers starved for I/O bandwidth hold on to other
> resources like cpu and memory. This problem can be solved by considering disk
> as a resource and including it in deciding how many containers can be
> concurrently run on a node.
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