Wangda Tan created YARN-7920:
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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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