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https://issues.apache.org/jira/browse/HBASE-29233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17987247#comment-17987247
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Duo Zhang commented on HBASE-29233:
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The commit on master breaks site build because it uses newer java specific
syntax.
Let me push an addendum to fix it.
And please also remove the usage instanceof casting syntax when backporting.
Thanks.
> Capture scan metrics at region level
> ------------------------------------
>
> Key: HBASE-29233
> URL: https://issues.apache.org/jira/browse/HBASE-29233
> Project: HBase
> Issue Type: Improvement
> Components: Client, metrics
> Reporter: Sanjeet Malhotra
> Assignee: Sanjeet Malhotra
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.0.0-beta-2
>
>
> In my company, we have a requirement that we would like to track scan metrics
> for requests belonging to certain use cases at region level along with
> getting info about where that region was hosted (RS) at the time of scan.
> This will help us in knowing to which all regions and RS the request was
> hitting and contribution of each region scan/RS in latency. Thus, I plan to
> store region name and RS server name in scan metrics object only and capture
> a list of Scan metrics (one per region scanned).
> The capturing of scan metrics at this finer granularity can be "opt-in" per
> Scan request and can be enabled via Scan attribute similar to how Scan
> Metrics are enabled.
>
> I would like to backport this change to HBase 3 and HBase 2.6 and 2.5.
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