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https://issues.apache.org/jira/browse/HBASE-25099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17204579#comment-17204579
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Duo Zhang commented on HBASE-25099:
-----------------------------------

Oh, there is a problem, that we can only changing the region replica count by 
disabling the table, but meta can not be disabled.

There are two possible solutions:

1. add the support to disable meta.
2. support changing region replica number without disabling table first.

WDYT [~stack]? For me, I think solution #2 is better to users, but the 
implementation will be more complicated.

Thanks.

> Change meta replica number by altering meta table descriptor
> ------------------------------------------------------------
>
>                 Key: HBASE-25099
>                 URL: https://issues.apache.org/jira/browse/HBASE-25099
>             Project: HBase
>          Issue Type: Improvement
>          Components: meta, read replicas
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>            Priority: Major
>
> As now we support altering meta table, it will be better to also deal with 
> changing meta replica number using altering meta, i.e, we could unify the 
> logic in MasterMetaBootstrap to ModifyTableProcedure, and another benefit is 
> that we do not need to restart master when changing the replica number for 
> meta.



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