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https://issues.apache.org/jira/browse/HBASE-14306?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yu Li updated HBASE-14306:
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Attachment: HBASE-14306.patch
Here is the initial patch
> Refine RegionGroupingProvider: fix issues and make it more scalable
> -------------------------------------------------------------------
>
> Key: HBASE-14306
> URL: https://issues.apache.org/jira/browse/HBASE-14306
> Project: HBase
> Issue Type: Improvement
> Components: wal
> Reporter: Yu Li
> Assignee: Yu Li
> Attachments: HBASE-14306.patch
>
>
> There're multiple issues in RegionGroupingProvider, including:
> * The provider cache in it is using byte array as the key of
> ConcurrentHashMap, which is not right (the reason is
> [here|http://stackoverflow.com/questions/1058149/using-a-byte-array-as-hashmap-key-java])
> * It's using IdentityGroupingStrategy to get group and use it as key of the
> cache, which means the cache will include an entry for each region. This is
> especially unnecessary when using BoundedRegionGroupingProvider
> Besides fixing the above issues, I suggest to change
> BoundedRegionGroupingProvider from a *provider* to a pluggable *strategy*,
> which will make the whole picture much more clear.
> For more details, please refer to the patch
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