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https://issues.apache.org/jira/browse/SAMZA-817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Navina Ramesh updated SAMZA-817:
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Attachment: SAMZA-817-1.patch
Attaching updated patch.
> Add metrics to gauge effectiveness of host-affinity solution
> ------------------------------------------------------------
>
> Key: SAMZA-817
> URL: https://issues.apache.org/jira/browse/SAMZA-817
> Project: Samza
> Issue Type: Sub-task
> Affects Versions: 0.10.0
> Reporter: Navina Ramesh
> Assignee: Navina Ramesh
> Fix For: 0.10.0
>
> Attachments: SAMZA-817-0.patch, SAMZA-817-1.patch
>
>
> We wanted to reduce to container start-up time for jobs that have large
> change logs. There is no metric to measure this.
> Additionally, Yarn host-affinity makes a best-effort to run a container in
> the requested host. There is no metric to measure this either.
> Proposal:
> Since task store restoration takes up most of the time during a container
> start-up time, we can measure the time to restore task stores. It may also
> help identify data distribution among the task stores. To measure
> "host-affinity" itself on Yarn, we can add a gauge for the ratio of container
> requests that is successfully matched to the requested host to the total
> container requests.
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