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https://issues.apache.org/jira/browse/HBASE-6215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13295963#comment-13295963
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Todd Lipcon commented on HBASE-6215:
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Cool. Our focus is more on (Dapper-like) tracing and a little less on metrics,
but the two are clearly related.
> per-request profiling
> ---------------------
>
> Key: HBASE-6215
> URL: https://issues.apache.org/jira/browse/HBASE-6215
> Project: HBase
> Issue Type: New Feature
> Reporter: Kannan Muthukkaruppan
> Assignee: Aurick Qiao
>
> Add ability to get HBase metrics back from an individual request. Apps can
> use this to track fine-grained metrics (such as server-side latency, block
> cache access/hit count; sync latency; append latency; etc.) on a per-API call
> basis. Also, enhance HBase shell to support this feature. [For example, if in
> the shell we turn profiling on, for all subsequent requests the profiling
> stats will be pretty printed, or optionally written to a file.]
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