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https://issues.apache.org/jira/browse/YARN-8468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16565514#comment-16565514
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Antal Bálint Steinbach commented on YARN-8468:
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Hi [~haibochen]!
Thanks for reviewing. I will upload a patch soon, before that I have some
questions:
1) I added "ContainerMaxAllocationCalculator" and removed validation/exception
throw
2a) I am not sure what to check, what is expected here. [~wilfreds] Can you
please help me figure out this. I will write on hangouts/chat.
2b) Removed from Metrics
3) In the
[doc|http://hadoop.apache.org/docs/r3.1.0/hadoop-yarn/hadoop-yarn-site/FairScheduler.html#Configuration]
and in the code _Resource_ is used for other queue parameters like
minResources, maxResources, maxChildResources. So I followed this in the method
names. Can you please clarify where shall I rename?
4) I see 2 space indentation everywhere in the code and team members told me 2
space is the convention. I am using _hadoop-format.xml_ as a formatter
template. I am confused.
> Limit container sizes per queue in FairScheduler
> ------------------------------------------------
>
> Key: YARN-8468
> URL: https://issues.apache.org/jira/browse/YARN-8468
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Affects Versions: 3.1.0
> Reporter: Antal Bálint Steinbach
> Assignee: Antal Bálint Steinbach
> Priority: Critical
> Attachments: YARN-8468.000.patch, YARN-8468.001.patch,
> YARN-8468.002.patch, YARN-8468.003.patch
>
>
> When using any scheduler, you can use "yarn.scheduler.maximum-allocation-mb"
> to limit the overall size of a container. This applies globally to all
> containers and cannot be limited by queue or and is not scheduler dependent.
>
> The goal of this ticket is to allow this value to be set on a per queue basis.
>
> The use case: User has two pools, one for ad hoc jobs and one for enterprise
> apps. User wants to limit ad hoc jobs to small containers but allow
> enterprise apps to request as many resources as needed. Setting
> yarn.scheduler.maximum-allocation-mb sets a default value for maximum
> container size for all queues and setting maximum resources per queue with
> “maxContainerResources” queue config value.
>
> Suggested solution:
>
> All the infrastructure is already in the code. We need to do the following:
> * add the setting to the queue properties for all queue types (parent and
> leaf), this will cover dynamically created queues.
> * if we set it on the root we override the scheduler setting and we should
> not allow that.
> * make sure that queue resource cap can not be larger than scheduler max
> resource cap in the config.
> * implement getMaximumResourceCapability(String queueName) in the
> FairScheduler
> * implement getMaximumResourceCapability() in both FSParentQueue and
> FSLeafQueue as follows
> * expose the setting in the queue information in the RM web UI.
> * expose the setting in the metrics etc for the queue.
> * write JUnit tests.
> * update the scheduler documentation.
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