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https://issues.apache.org/jira/browse/YARN-1197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13813933#comment-13813933
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Wangda Tan commented on YARN-1197:
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[~bikassaha]
Actually I was on half way of implementing these and stopped by other works. :-/
For putting increasing request to ResourceRequest,
I agree, I really spent some time (the half-baked scheduler supporting
increase) to prove putting increasing request to resource request is NOT good,
even if you mentioned it before :(. The original reason I put increasing
request to ResourceRequest because in literally speaking, the increasing
request is another form of "resource request", it also ask for more resource,
the only difference is increasing request add a restriction on the request.
But in real YARN's implementation, it's problematic to make it being part of
resource request, I need to handle increasing cases everywhere in RM. I think
making it a new member in AllocateRequest is cleaner solution, but potentially,
it will cause more interfaces/implements changes (like SchedulerApplication,
YARNScheduler, etc.). I'll continue look at it before starting write code.
I also agree for you comments for improving representation of
ChangeContainerResourceResponse and the missed ResourceIncreaseContextProto in
AllocateResponse. I'll add my design proposal for handle new resource in
monitoring module.
Again, your comments are really helpful, hope to get your more ideas :)
> Support changing resources of an allocated container
> ----------------------------------------------------
>
> Key: YARN-1197
> URL: https://issues.apache.org/jira/browse/YARN-1197
> Project: Hadoop YARN
> Issue Type: Task
> Components: api, nodemanager, resourcemanager
> Affects Versions: 2.1.0-beta
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Attachments: yarn-1197-v2.pdf, yarn-1197-v3.pdf, yarn-1197.pdf
>
>
> Currently, YARN cannot support merge several containers in one node to a big
> container, which can make us incrementally ask resources, merge them to a
> bigger one, and launch our processes. The user scenario is described in the
> comments.
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