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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9754) Eliminate threadlocal from MVCC code
Date Fri, 18 Oct 2013 22:09:55 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13799575#comment-13799575
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Lars Hofhansl commented on HBASE-9754:
--------------------------------------

StoreScanner is pretty internal. [~giacomotaylor]?

> 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-rp-0.txt, 9754-rp-1.txt, 9754-rp-hregion.txt, 9754-rp-hregion-v2.txt,
9754-rp-hregion-v3.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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