Subru Krishnan created YARN-4879:
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Summary: Proposal for a simple (delta) allocate protocol
Key: YARN-4879
URL: https://issues.apache.org/jira/browse/YARN-4879
Project: Hadoop YARN
Issue Type: Improvement
Components: applications, resourcemanager
Reporter: Subru Krishnan
Assignee: Subru Krishnan
For legacy reasons, the current allocate protocol expects expanded requests
which represent the cumulative request for any change in resource constraints.
This is not only very difficult to comprehend but makes it impossible for the
scheduler to associate container allocations to the original requests. This
problem is amplified by the fact that the expansion is managed by the
AMRMClient which makes it cumbersome for non-Java clients as they all have to
replicate the non-trivial logic. In this JIRA, we are proposing a delta
allocate protocol where the AM will need to only specify changes in resource
constraints.
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