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Posted to issues@hbase.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2013/10/13 03:32:42 UTC
[jira] [Updated] (HBASE-9754) Consider eliminating threadlocals
from MVCC code
[ https://issues.apache.org/jira/browse/HBASE-9754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lars Hofhansl updated HBASE-9754:
---------------------------------
Description:
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.
was:
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.
> Consider eliminating threadlocals from MVCC code
> ------------------------------------------------
>
> Key: HBASE-9754
> URL: https://issues.apache.org/jira/browse/HBASE-9754
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
>
> 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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