[
https://issues.apache.org/jira/browse/HBASE-9754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13796821#comment-13796821
]
Ted Yu commented on HBASE-9754:
-------------------------------
BaseRegionObserver is marked
{code}
@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC)
@InterfaceStability.Evolving
{code}
We can add a new method which sets the current MVCC readpoint for the observer.
Another method returns MVCC readpoint that would be utilized in constructing
StoreScanner.
> 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
> Assignee: Ted Yu
> Fix For: 0.98.0
>
> Attachments: 9754-rp-0.txt
>
>
> Brought up by [~vrodionov] and [~yuzhih...@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.
--
This message was sent by Atlassian JIRA
(v6.1#6144)
