[jira] [Commented] (YARN-1651) CapacityScheduler side changes to support increase/decrease container resource.

["MENG DING (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-1651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14723493#comment-14723493 ] 

MENG DING commented on YARN-1651:
---------------------------------

[~leftnoteasy], I just realized that there is one issue not discussed in the protocol design regarding the {{ContainerResourceChangeRequestProto}} that may affect the scheduler:

{code}
message ContainerResourceChangeRequestProto {
  optional ContainerIdProto container_id = 1;
  optional ResourceProto capability = 2;
} 
{code}

Shall we add a priority field to {{ContainerResourceChangeRequestProto}}? Without a priority field, how does the scheduler decide the priority between increase/decrease request and new allocation request within the same application? Does it simply assume that the increase/decrease request has the highest priority within the same application? If so, that may not be the correct thing to do ... What do you think?

> CapacityScheduler side changes to support increase/decrease container resource.
> -------------------------------------------------------------------------------
>
>                 Key: YARN-1651
>                 URL: https://issues.apache.org/jira/browse/YARN-1651
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager, scheduler
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>




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