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https://issues.apache.org/jira/browse/HBASE-11165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14100778#comment-14100778
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Jimmy Xiang commented on HBASE-11165:
-------------------------------------

I agree with Matteo on this. One more benefit to have meta and master together 
is the meta/master recovery will be much simpler (I mean there won't be 
scenario like master is recovering,  meta regionserver may be down).

> Scaling so cluster can host 1M regions and beyond (50M regions?)
> ----------------------------------------------------------------
>
>                 Key: HBASE-11165
>                 URL: https://issues.apache.org/jira/browse/HBASE-11165
>             Project: HBase
>          Issue Type: Brainstorming
>            Reporter: stack
>         Attachments: HBASE-11165.zip, Region Scalability test.pdf, 
> zk_less_assignment_comparison_2.pdf
>
>
> This discussion issue comes out of "Co-locate Meta And Master HBASE-10569" 
> and comments on the doc posted there.
> A user -- our Francis Liu -- needs to be able to scale a cluster to do 1M 
> regions maybe even 50M later.  This issue is about discussing how we will do 
> that (or if not 50M on a cluster, how otherwise we can attain same end).
> More detail to follow.



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