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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4991) Provide capability to delete named region
Date Thu, 01 Mar 2012 20:48:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13220345#comment-13220345

stack commented on HBASE-4991:

bq. When we change the location of rename() call from master to region server for distributed
log splitting, the duration was shortened from 22 minutes to 7 minutes for the same dataset.

Because rename was done via multiple clients rather than in parallel on master?  You sure
it wasn't because of something else? (Distributed splitting is a different type of process
to what is going on here)

What do you want to farm out to the regionservers?  We are already farming out work in the
design above.  We ask the regionservers to close regions for us.  You want to farm out more
than this?  Control?  To what end other than complicating the design?

bq. I wonder if you have statistics showing that master-side operation (for moving/deleting
data of old regions) makes no difference in performance w.r.t. distributed operations.

Well, stands to reason I'd think.  I'd put it on you to come up w/ proof that what seems reasonable
actually isn't, at least when talking about the tens of regions at most which is what I think
this issue is about.
> Provide capability to delete named region
> -----------------------------------------
>                 Key: HBASE-4991
>                 URL: https://issues.apache.org/jira/browse/HBASE-4991
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Mubarak Seyed
>             Fix For: 0.94.0
>         Attachments: HBASE-4991.trunk.v1.patch, HBASE-4991.trunk.v2.patch
> See discussion titled 'Able to control routing to Solr shards or not' on lily-discuss
> User may want to quickly dispose of out of date records by deleting specific regions.

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