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https://issues.apache.org/jira/browse/HBASE-5914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13267134#comment-13267134
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chunhui shen commented on HBASE-5914:
-------------------------------------
bq.how do we know that regions have been assigned ?
We don't need wait until regions assigned, and quickAssign() just ensure the
rpc of open region is sent successfully.
For example, in current process of ServerShutdownHandler, it just call
AssignmentManager#assign(region, true)(return void) and didn't wait
> Bulk assign regions in the process of ServerShutdownHandler
> -----------------------------------------------------------
>
> Key: HBASE-5914
> URL: https://issues.apache.org/jira/browse/HBASE-5914
> Project: HBase
> Issue Type: Improvement
> Reporter: chunhui shen
> Assignee: chunhui shen
> Fix For: 0.96.0
>
> Attachments: HBASE-5914.patch, HBASE-5914v2.patch
>
>
> In the process of ServerShutdownHandler, we currently assign regions singly.
> In the large cluster, one regionserver always carried many regions, this
> action is quite slow.
> What about using bulk assign regions like cluster start up.
> In current logic, if we failed assigning many regions to one destination
> server, we will wait unitl timeout,
> however in the process of ServerShutdownHandler, we should retry it to
> another server.
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