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https://issues.apache.org/jira/browse/HBASE-12148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15209378#comment-15209378
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Walter Koetke commented on HBASE-12148:
---------------------------------------

Lars, can you be more specific about what the problem is with having just this 
one implementation, as opposed to one that's synchronized and one that is not? 
Unless there is a mistake in this patched TimeRangeTracker as implemented, the 
intent is that it would be thread safe and support both usages, with the 
AtomicReference, the compareAndSet, etc.

> Remove TimeRangeTracker as point of contention when many threads writing a 
> Store
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-12148
>                 URL: https://issues.apache.org/jira/browse/HBASE-12148
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Performance
>    Affects Versions: 2.0.0, 0.99.1
>            Reporter: stack
>            Assignee: Walter Koetke
>             Fix For: 2.0.0, 1.3.0, 0.98.19
>
>         Attachments: 
> 0001-In-AtomicUtils-change-updateMin-and-updateMax-to-ret.patch, 
> 12148.addendum.txt, 12148.txt, 12148.txt, 12148v2.txt, 12148v2.txt, 
> HBASE-12148-V3.patch, HBASE-12148.txt, HBASE-12148V2.txt, Screen Shot 
> 2014-10-01 at 3.39.46 PM.png, Screen Shot 2014-10-01 at 3.41.07 PM.png, 
> TimeRangeTracker.tiff
>
>




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