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https://issues.apache.org/jira/browse/HBASE-11290?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Antonov updated HBASE-11290:
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Attachment: HBASE-11290.draft.patch
Some time ago in the parent jira we started discussion the concurrency around
regionstates, so more like to continue this discussion and illustrate some
thoughts I'm humbly posting draft in here..For others to look at. This is
conservative, and I didn't redo heavy and supposedly rarely called methods to
use separate locks-per-invariant, but hope to reduce read contention on get***
calls.
> Unlock RegionStates
> -------------------
>
> Key: HBASE-11290
> URL: https://issues.apache.org/jira/browse/HBASE-11290
> Project: HBase
> Issue Type: Sub-task
> Reporter: Francis Liu
> Assignee: Francis Liu
> Attachments: HBASE-11290.draft.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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