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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9754) Eliminate threadlocal from MVCC code
Date Wed, 12 Mar 2014 03:13:53 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13931344#comment-13931344
] 

Yu Li commented on HBASE-9754:
------------------------------

Hi [~lhofhansl] and [~yuzhihong@gmail.com],

Just would like to check is it ready now to commit this to 0.94? Or any work left to be done?
I'm considering backport HBASE-10191(although still not commit to trunk, but seems will be
in a short time) to 0.94 and observing some code gap there w/o this patch. Thanks. :-)

> Eliminate threadlocal from MVCC code
> ------------------------------------
>
>                 Key: HBASE-9754
>                 URL: https://issues.apache.org/jira/browse/HBASE-9754
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Ted Yu
>             Fix For: 0.98.0
>
>         Attachments: 9754-0.94-v2.txt, 9754-0.94.txt, 9754-addendum.txt, 9754-rp-0.txt,
9754-rp-1.txt, 9754-rp-hregion-v2.txt, 9754-rp-hregion-v3.txt, 9754-rp-hregion.txt
>
>
> Brought up by [~vrodionov] and [~yuzhihong@gmail.com].
> Currently we use ThreadLocals to communicate the current readpoint between a RegionScanner
and the Store\{File}Scanner's down the stack.
> Since ThreadLocals are not cheap we should consider whether it is possible to pass the
readpoint through the call stack instead.



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