KWON BYUNGCHANG created YARN-10899:
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Summary: controll whether non-exclusive allocation is used
Key: YARN-10899
URL: https://issues.apache.org/jira/browse/YARN-10899
Project: Hadoop YARN
Issue Type: Improvement
Reporter: KWON BYUNGCHANG
A non-exclusive partition has the advantage of increasing resource utilization.
But, it is not useful in all use cases.
In the case of a long-running container,
if it is allocated with non-exclusive allocation, it is more likely to be
preempted and the overhead of repeating the same operation occurs.
A function that can control whether non-exclusive allocation is used from the
user's point of view is required.
I suggest:
When node label expression is empty string, only default partition without
non-exclusive partition is used,
when node label expression is null, only it allowed non-exclusive allocation.
I will attach patch.
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