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Date: Thu, 1 Aug 2013 16:21:48 +0000 (UTC)
From: "Alejandro Abdelnur (JIRA)" <jira@apache.org>
To: yarn-dev@hadoop.apache.org
Message-ID: <JIRA.12661163.1375374007360.152338.1375374108592@arcas>
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Subject: [jira] [Created] (YARN-1010) FairScheduler: decouple container
 scheduling from nodemanager heartbeats
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Alejandro Abdelnur created YARN-1010:
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             Summary: FairScheduler: decouple container scheduling from nodemanager heartbeats
                 Key: YARN-1010
                 URL: https://issues.apache.org/jira/browse/YARN-1010
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: scheduler
    Affects Versions: 2.1.0-beta
            Reporter: Alejandro Abdelnur
            Assignee: Alejandro Abdelnur
            Priority: Critical


Currently scheduling for a node is done when a node heartbeats.

For large cluster where the heartbeat interval is set to several seconds this delays scheduling of incoming allocations significantly.

We could have a continuous loop scanning all nodes and doing scheduling. If there is availability AMs will get the allocation in the next heartbeat after the one that placed the request.

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