Swapnil Daingade commented on YARN-2139:

Had a look at the latest design doc and was wondering if it would be possible 
to make the isolation part separate and optional from the avoiding 
over-allocation part. Enforcing isolation using Cgroups may not always work, 
especially in cases where HDFS is not the default dfs.

> [Umbrella] Support for Disk as a Resource in YARN 
> --------------------------------------------------
>                 Key: YARN-2139
>                 URL: https://issues.apache.org/jira/browse/YARN-2139
>             Project: Hadoop YARN
>          Issue Type: New Feature
>            Reporter: Wei Yan
>         Attachments: Disk_IO_Isolation_Scheduling_3.pdf, 
> Disk_IO_Scheduling_Design_1.pdf, Disk_IO_Scheduling_Design_2.pdf, 
> YARN-2139-prototype-2.patch, YARN-2139-prototype.patch
> YARN should consider disk as another resource for (1) scheduling tasks on 
> nodes, (2) isolation at runtime, (3) spindle locality. 

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