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From "Carlo Curino (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5324) Stateless router policies implementation
Date Fri, 22 Jul 2016 21:10:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-5324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15390197#comment-15390197

Carlo Curino commented on YARN-5324:

[~yochen] thanks for reviewing this.  

 # The {{ProbabilisticRouterFederationPolicy}} was renamed to {{WeightedRandomRouterFederationPolicy}}.

 # The snippet you quote was still there, good catch. I added to all test cases a corner check
that forces us to be aware of weights missing info about an active clusters, and fixed the
NPE in {{WeightedRandomRouterFederationPolicy}} and other classes. 

 # The latest patch also includes a {{LoadBasedRouterFederationPolicy}} that parses the {{ClusterMetricsInfo}}
from String capability and picks the cluster with the most free space {{max(availableMemoryMB}}
(and adds tests for that and {{OrderedRouterFederationPolicy}}.
 # We could probably polish the tests (I think there is a bunch of redundancy. 

> Stateless router policies implementation
> ----------------------------------------
>                 Key: YARN-5324
>                 URL: https://issues.apache.org/jira/browse/YARN-5324
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>         Attachments: YARN-5324.01.patch, YARN-5324.02.patch, YARN-5324.03.patch, YARN-5324.04.patch
> These are policies at the Router that do not require maintaing state across choices (e.g.,
weighted random).

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