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From "Jonathan Hsieh (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5101) Add a max number of regions per regionserver limit
Date Thu, 29 Dec 2011 14:39:31 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13177206#comment-13177206
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Jonathan Hsieh commented on HBASE-5101:
---------------------------------------

@Ted
First cut -- simply some configured number of max regions.  Maybe it would stop splitting
at a point where it can handle if some number of rs's going down and its regions are reassigned.

There could possibly be a limit on tables as well -- and we could put cap on the # of region
servers/table and # of regions/region server.  
                
> Add a max number of regions per regionserver limit
> --------------------------------------------------
>
>                 Key: HBASE-5101
>                 URL: https://issues.apache.org/jira/browse/HBASE-5101
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 0.92.0
>            Reporter: Jonathan Hsieh
>
> In a testing environment, a cluster got to a state with more than 1500 regions per region
server, and essentially became stuck and unavailable.  We could add a limit to the number
of regions that a region server can serve to prevent this from happening.  This looks like
it could be implemented in the core or as a coprocessor.

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