Wangda Tan created YARN-5342:
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Summary: Improve non-exclusive node partition resource allocation
in Capacity Scheduler
Key: YARN-5342
URL: https://issues.apache.org/jira/browse/YARN-5342
Project: Hadoop YARN
Issue Type: Improvement
Reporter: Wangda Tan
Assignee: Wangda Tan
In the previous implementation, one non-exclusive container allocation is
possible when the missed-opportunity >= #cluster-nodes. And missed-opportunity
will be reset when container allocated to any node.
This will slow down the frequency of container allocation on non-exclusive node
partition: *When a non-exclusive partition=x has idle resource, we can only
allocate one container for this app in every X=nodemanagers.heartbeat-interval
secs for the whole cluster.*
In this JIRA, I propose a fix to reset missed-opporunity only if we have >0
pending resource for the non-exclusive partition OR we get allocation from the
default partition.
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