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From "Arun Suresh (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-7258) Add Node and Rack Hints to Opportunistic Scheduler
Date Tue, 26 Sep 2017 22:51:00 GMT
Arun Suresh created YARN-7258:

             Summary: Add Node and Rack Hints to Opportunistic Scheduler
                 Key: YARN-7258
                 URL: https://issues.apache.org/jira/browse/YARN-7258
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Arun Suresh
            Assignee: kartheek muthyala

Currently, the Opportunistic Scheduler ignores the node and rack information and allocates
strictly on the least loaded node (based on queue length) at the time it received the request.
This JIRA is to track changes needed to allow the OpportunisticContainerAllocator to take
the node/rack name as hints.

The flow would be:
# If requested node found in the top K leastLoaded nodes, allocate on that node
# Else, allocate on least loaded node on the same rack from the top K least Loaded nodes.
# Else, allocate on least loaded node.

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