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https://issues.apache.org/jira/browse/HBASE-12116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14494226#comment-14494226
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Andrew Purtell commented on HBASE-12116:
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I know you were just using YCSB as a load generator but if playing with YCSB
you might find this interesting:
https://github.com/apurtell/YCSB2/tree/new_hbase_client
Blog post on coordinated omission corrections in this version:
http://psy-lob-saw.blogspot.co.at/2015/03/fixing-ycsb-coordinated-omission.html
(TL;DR: Use -target and -p measurementtype=hdrhistogram. Optionally,-p
hdrhistogram.fileoutput=<true|false> -p hdrhistogram.output.path=<path> and
[HistogramLogProcessor|https://github.com/HdrHistogram/HdrHistogram/blob/master/HistogramLogProcessor]
and
[plotFiles|https://github.com/HdrHistogram/HdrHistogram/blob/master/GoogleChartsExample/plotFiles.html]
to plot latency by percentile.)
I've been meaning to try it out.
> Hot contention spots; writing
> -----------------------------
>
> Key: HBASE-12116
> URL: https://issues.apache.org/jira/browse/HBASE-12116
> Project: HBase
> Issue Type: Bug
> Reporter: stack
> Assignee: stack
> Attachments: 12116.checkForReplicas.txt,
> 12116.stringify.and.cache.scanner.maxsize.txt, 12116.txt, Screen Shot
> 2014-09-29 at 5.12.51 PM.png, Screen Shot 2014-09-30 at 10.39.34 PM.png,
> Screen Shot 2015-04-13 at 2.03.05 PM.png, perf.write3.svg, perf.write4.svg
>
>
> Playing with flight recorder, here are some write-time contentious
> synchronizations/locks (picture coming)
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