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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6599) Support rich placement constraints in scheduler
Date Tue, 16 Jan 2018 17:46:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16327451#comment-16327451
] 

Sunil G commented on YARN-6599:
-------------------------------

 Thanks [~leftnoteasy]. Few comments.
 # {{public static final String APP_ID_TAG_PREFIX = "yarn_app_id/";}} Could this be categorized
under {{yarn_application_label}} as sub category. I think if all app related could be under
same tag, its better.
 # {{CapacitySchedulerConfiguration.SCHEDULING_REQUEST_ALLOWED}} I think this flag is not
needed. Could we simply check whether *schedulingRequests* is present along with *resourceRequests*
and handle error scenarios. Any advantage of having this flag other than validation?
 # scope of anti-affinity is only to intra-app when PlacementConstraints is Node. *intra-app*
is a bit confusing term to me. For eg, we are at high level now doing an anti-affinity for
app1's region server not run with app1's hmaster. Does this mean that app2's hmaster can run
with app1's region server. cud u pls help to clarify this.
 # Levels of iterations to check whether a constraint is valid or not is a bit sequential.
So could we have a state level verfication whether an incoming request with a constraint is
valid or not. What i meant is tat, we can move these validations to a separate class so that
its very much easy to define error states etc.

> Support rich placement constraints in scheduler
> -----------------------------------------------
>
>                 Key: YARN-6599
>                 URL: https://issues.apache.org/jira/browse/YARN-6599
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>            Priority: Major
>         Attachments: YARN-6599-YARN-6592.003.patch, YARN-6599-YARN-6592.004.patch, YARN-6599-YARN-6592.005.patch,
YARN-6599-YARN-6592.006.patch, YARN-6599-YARN-6592.007.patch, YARN-6599-YARN-6592.008.patch,
YARN-6599-YARN-6592.009.patch, YARN-6599-YARN-6592.010.patch, YARN-6599-YARN-6592.wip.002.patch,
YARN-6599.poc.001.patch
>
>




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