[jira] [Commented] (YARN-2791) Add Disk as a resource for scheduling

["Wei Yan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-2791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14192536#comment-14192536 ] 

Wei Yan commented on YARN-2791:
-------------------------------

Hi, [~sdaingade]. Is this a duplicate of YARN-2139? We have worked on the disk I/O scheduling for a while, and will post patches soon after more experiments.

> Add Disk as a resource for scheduling
> -------------------------------------
>
>                 Key: YARN-2791
>                 URL: https://issues.apache.org/jira/browse/YARN-2791
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: scheduler
>    Affects Versions: 2.5.1
>            Reporter: Swapnil Daingade
>
> 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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