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From "chunhui shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10209) Speed region assign in failover
Date Mon, 23 Dec 2013 03:06:50 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13855350#comment-13855350
] 

chunhui shen commented on HBASE-10209:
--------------------------------------

The improvement makes sense, 

but is there any risk on concurrent assignment, 
e.g.  Server Shutdown event happen in the same time when assigning.

Wait more body to take a see since I can't think the scenarios about assignment clearly.

> Speed region assign in failover
> -------------------------------
>
>                 Key: HBASE-10209
>                 URL: https://issues.apache.org/jira/browse/HBASE-10209
>             Project: HBase
>          Issue Type: Improvement
>          Components: Region Assignment
>    Affects Versions: 0.94.14
>            Reporter: binlijin
>         Attachments: HBASE-10209-94-2.patch, HBASE-10209-94.patch
>
>
> During master initializate, if there are regionservers shutdown improperly previous or
 start up failed, master will think this is a failover and assign regions one by one.
> We have a cluster with 200+ nodes and 32000+regions, it takes 50mins to start up all.
> The patch is based on 0.94 branch, and trunk is different now.



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