Karthik Kambatla commented on YARN-2618:

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

This message was sent by Atlassian JIRA

Reply via email to