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From "Bill Farner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AURORA-122) Introduce a task store secondary index on slave host
Date Sun, 26 Jan 2014 21:30:37 GMT

    [ https://issues.apache.org/jira/browse/AURORA-122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13882433#comment-13882433
] 

Bill Farner commented on AURORA-122:
------------------------------------

https://reviews.apache.org/r/17372/

> Introduce a task store secondary index on slave host
> ----------------------------------------------------
>
>                 Key: AURORA-122
>                 URL: https://issues.apache.org/jira/browse/AURORA-122
>             Project: Aurora
>          Issue Type: Story
>          Components: Scheduler
>            Reporter: Bill Farner
>            Assignee: Bill Farner
>
> We've observed the {{resourceOffers}} callback taking longer than desired in large clusters.
 Timing has indicated that they take as long as 100ms regularly, with occasional calls taking
as long as a minute.  We've narrowed down the majority of time spent to be performing expensive
task store queries by slave host (in {{GcExecutorLauncher}}.  When lots of hosts and tasks
are present, these calls should be considerably faster if we maintain a index on slave host
to avoid full task store scans.



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