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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12148) Remove TimeRangeTracker as point of contention when many threads writing a Store
Date Thu, 14 Apr 2016 05:28:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15240627#comment-15240627

stack commented on HBASE-12148:

Ok. So, scratching this last patch. It could make lots of objects at read-time and besides,
as [~lhofhansl] says, this issue is about write time, not read time, which is what I (and
[~wkoetke]) are complaining about.

The fix for read time is pretty straight-forward; just use a TimeRange as opposed to a TimeRangeTracker
when reading. See HBASE-15650 for patch.

I'll come back here when doing more write tests; I like the [~wkoetke] patch.. maybe we can
do a version for write-time (Chatting w/ our Matteo, he was suggesting we might be able to
reuse the little data structure objects that are in the [~wkoetke] patch which would be great...

> 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, 12148v4.patch, HBASE-12148-V3.patch,
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, Screen Shot 2016-04-13 at 1.49.30 PM.png,
Screen Shot 2016-04-13 at 2.02.22 PM.png, TimeRangeTracker.tiff

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