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https://issues.apache.org/jira/browse/YARN-7612?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16300419#comment-16300419
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Sunil G commented on YARN-7612:
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Thanks [~asuresh] and [~kkaranasos] for working on this.
Some comments in general:
# I think *enablePlacementConstraints* could be application specific as well. I
think if we can get YARN-7666 in, we could use that envs to specify whether an
app needed to enable such constraints (more clearly to disable if needed).
# PlacementConstraintsManager interface could have some more javadoc to
indicate more details about apis
# When will PlacementConstraintsManager be cleared OR contents deleted when
apps are completed?
# NodeCandidateSelector is added in this patch. How different it is with
existing *CandidateNodeSet* impls. We are adding a MultiNodeSelector in
YARN-7494. and same could be used for all such complex node select strategies.
Could we make use of same.?
# BatchedRequests is grouping a bunch of requests. Whats the criteria to
include requests to a batch? Are expecting more policies in this? such as
affinity etc. Because I can see we have different tag based view also in each
batches. So whats the relation of these tags across batches?
# RM_PLACEMENT_RETRY_ATTEMPTS is at YARN level. Will it be more or less an
applications choice?
I am still going through this code and may share some more comments if I have.
Once again thanks for this great effort.
> Add Placement Processor Framework
> ---------------------------------
>
> Key: YARN-7612
> URL: https://issues.apache.org/jira/browse/YARN-7612
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Arun Suresh
> Assignee: Arun Suresh
> Attachments: YARN-7612-YARN-6592.001.patch,
> YARN-7612-YARN-6592.002.patch, YARN-7612-YARN-6592.003.patch,
> YARN-7612-YARN-6592.004.patch, YARN-7612-YARN-6592.005.patch,
> YARN-7612-YARN-6592.006.patch, YARN-7612-YARN-6592.007.patch,
> YARN-7612-YARN-6592.008.patch, YARN-7612-v2.wip.patch, YARN-7612.wip.patch
>
>
> This introduces a Placement Processor and a Planning algorithm framework to
> handle placement constraints and scheduling requests from an app and places
> them on nodes.
> The actual planning algorithm(s) will be handled in a YARN-7613.
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