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Posted to yarn-issues@hadoop.apache.org by "Anubhav Dhoot (JIRA)" <ji...@apache.org> on 2015/07/13 22:54:04 UTC

[jira] [Created] (YARN-3920) FairScheduler Reserving a node for a container should be configurable to allow it used only for large containers

Anubhav Dhoot created YARN-3920:
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             Summary: FairScheduler Reserving a node for a container should be configurable to allow it used only for large containers
                 Key: YARN-3920
                 URL: https://issues.apache.org/jira/browse/YARN-3920
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: fairscheduler
            Reporter: Anubhav Dhoot
            Assignee: Anubhav Dhoot


Reserving a node for a container was designed for preventing large containers from starvation from small requests that keep getting into a node. Today we let this be used even for a small container request. This has a huge impact on scheduling since we block other scheduling requests until that reservation is fulfilled. We should make this configurable so its impact can be minimized by limiting it for large container requests as originally intended. 



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