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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12133) Add FastLongHistogram for metric computation
Date Wed, 01 Oct 2014 15:20:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14154923#comment-14154923
] 

stack commented on HBASE-12133:
-------------------------------

[~daviddengcn] Sorry, our ci build is a bit of mess at the moment.  Let me spend some time
today and try and clean it up some.

[~manukranthk] Yes, was referring to yammer histograms.  Was wondering difference between
them and this.  You lot think this implementation 'faster'?

I'd actually like to use the setMin/setMax in another location.  I'd be up for adding this
stuff if you add a client for this new util and if you had a rough compare against yammer
that showed yours better.  Thanks.

> Add FastLongHistogram for metric computation
> --------------------------------------------
>
>                 Key: HBASE-12133
>                 URL: https://issues.apache.org/jira/browse/HBASE-12133
>             Project: HBase
>          Issue Type: New Feature
>          Components: metrics
>    Affects Versions: 0.98.8
>            Reporter: Yi Deng
>            Assignee: Yi Deng
>            Priority: Minor
>              Labels: histogram, metrics
>             Fix For: 0.98.8
>
>         Attachments: 0001-Add-FastLongHistogram-for-fast-histogram-estimation.patch,
0001-Add-FastLongHistogram-for-fast-histogram-estimation.patch, 0001-Add-FastLongHistogram-for-fast-histogram-estimation.patch
>
>
> FastLongHistogram is a thread-safe class that estimate distribution of data and computes
the quantiles. It's useful for computing aggregated metrics like P99/P95.



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