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https://issues.apache.org/jira/browse/HBASE-23562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17053618#comment-17053618
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Josh Elser commented on HBASE-23562:
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bq. should we consider adding this functionality natively
We actually already have this functionality natively in the Region Normalizer
chore.
I'd like to see some differentiation to prevent this feature and the Region
Normalizer from overlapping and causing confusion in "how do I reduce the
regions in my cluster"?
Thinking about it quickly, I think if we focus the Normalizer on "slow,
always-on, always correcting, low-user impact" and this tool on "Proactively
merging many regions together, high-user impact, 'fast'", that's a decent
distinction.
> [operator tools] Add a RegionsMerge tool that allows for merging multiple
> adjacent regions until a desired number of regions is reached.
> ----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-23562
> URL: https://issues.apache.org/jira/browse/HBASE-23562
> Project: HBase
> Issue Type: New Feature
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Minor
>
> There's been a few occasions where different customers had faced the need to
> reduce the number of regions for specific tables, either due to mistakenly
> pre-split or after a purge in table data. This jira is for adding a simple
> merge tool that takes the table name and the desired number of regions, then
> perform region merges until the total number of regions for the given table
> reached the passed valued.
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