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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-11290) Unlock RegionStates
Date Tue, 07 Jun 2016 23:11:23 GMT

     [ https://issues.apache.org/jira/browse/HBASE-11290?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-11290:
-----------------------------------
    Fix Version/s:     (was: 0.98.20)
                   0.98.21

> 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, 0.98.21
>
>         Attachments: HBASE-11290-0.98.patch, HBASE-11290-0.98_v2.patch, HBASE-11290.01.branch-1.patch,
HBASE-11290.02.patch, HBASE-11290.03.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.



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