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Posted to yarn-issues@hadoop.apache.org by "Lantao Jin (JIRA)" <ji...@apache.org> on 2019/04/03 05:39:00 UTC
[jira] [Commented] (YARN-9394) Use new API of RackResolver to get
better performance
[ https://issues.apache.org/jira/browse/YARN-9394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16808385#comment-16808385 ]
Lantao Jin commented on YARN-9394:
----------------------------------
Uploaded.
> Use new API of RackResolver to get better performance
> -----------------------------------------------------
>
> Key: YARN-9394
> URL: https://issues.apache.org/jira/browse/YARN-9394
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: yarn
> Affects Versions: 3.3.0, 3.2.1
> Reporter: Lantao Jin
> Assignee: Lantao Jin
> Priority: Major
> Attachments: YARN-9394.001.patch, YARN-9394.002.patch
>
>
> After adding a new API in RackResolver YARN-9332, some old callers should switch to new API to get better performance. As an example, Spark [YarnAllocator|https://github.com/apache/spark/blob/733f2c0b98208815f8408e36ab669d7c07e3767f/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala#L361-L363] for Dynamic Allocation invokes [https://github.com/apache/hadoop/blob/6fa229891e06eea62cb9634efde755f40247e816/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/AMRMClientImpl.java#L550] to resolve racks in a loop.
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