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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-7920) Cleanup configuration of PlacementConstraints
Date Sun, 11 Feb 2018 02:10:00 GMT
Wangda Tan created YARN-7920:
--------------------------------

             Summary: Cleanup configuration of PlacementConstraints
                 Key: YARN-7920
                 URL: https://issues.apache.org/jira/browse/YARN-7920
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Wangda Tan
            Assignee: Wangda Tan


Currently it is very confusing to have the two configs in two different files (yarn-site.xml
and capacity-scheduler.xml). 
 
Maybe a better approach is: we can delete the scheduling-request.allowed in CS, and update
placement-constraints configs in yarn-site.xml a bit: 
 
- Remove placement-constraints.enabled, and add a new placement-constraints.handler, by default
is none, and other acceptable values are a. external-processor (since algorithm is too generic
to me), b. scheduler. 
- And add a new PlacementProcessor just to pass SchedulingRequest to scheduler without any
modifications.



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