hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mikhail Antonov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11290) Unlock RegionStates
Date Thu, 28 Apr 2016 18:20:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15262668#comment-15262668
] 

Mikhail Antonov commented on HBASE-11290:
-----------------------------------------

That's the MultiLock class in the patch to the jira I mentioned.  The approach I used there
trying to optimize concurrent meta lookups doesn't look feasible, but the implementation of
the lock might be useful to someone.

If we could have up-to-date patches for both trunk and branch-1 that would be great! It seems
a useful change where a lot of effort went in (both in writing the code and in reviewing different
versions of the patch), pity if that keeps sitting around...

> Unlock RegionStates
> -------------------
>
>                 Key: HBASE-11290
>                 URL: https://issues.apache.org/jira/browse/HBASE-11290
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 1.2.0, 1.3.0
>            Reporter: Francis Liu
>            Assignee: Francis Liu
>             Fix For: 2.0.0, 1.4.0, 0.98.20
>
>         Attachments: HBASE-11290-0.98.patch, HBASE-11290-0.98_v2.patch, HBASE-11290.draft.patch,
HBASE-11290_trunk.patch
>
>
> Even though RegionStates is a highly accessed data structure in HMaster. Most of it's
methods are synchronized. Which limits concurrency. Even simply making some of the getters
non-synchronized by using concurrent data structures has helped with region assignments. We
can go as simple as this approach or create locks per region or a bucket lock per region bucket.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message