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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-4719) Add a helper library to maintain node state and allows common queries
Date Mon, 22 Feb 2016 16:47:18 GMT
Karthik Kambatla created YARN-4719:
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             Summary: Add a helper library to maintain node state and allows common queries
                 Key: YARN-4719
                 URL: https://issues.apache.org/jira/browse/YARN-4719
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: scheduler
    Affects Versions: 2.8.0
            Reporter: Karthik Kambatla
            Assignee: Karthik Kambatla


The scheduler could use a helper library to maintain node state and allowing matching/sorting
queries. Several reasons for this:
# Today, a lot of the node state management is done separately in each scheduler. Having a
single library will take us that much closer to reducing duplication among schedulers.
# Adding a filtering/matching API would simplify node labels and locality significantly. 
# An API that returns a sorted list for a custom comparator would help YARN-1011 where we
want to sort by allocation and utilization for continuous/asynchronous and opportunistic scheduling
respectively. 



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