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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4991) Provide capability to delete named region
Date Mon, 20 Feb 2012 23:57:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13212228#comment-13212228
] 

Todd Lipcon commented on HBASE-4991:
------------------------------------

I'm cool with the API now. I'm a bit nervous about the complexity of the implementation -
the fact that this (and the online schema change) have to do things like disable splits and
disable balancing is a little "smelly" to me. But, I don't necessarily have a better idea.

In terms of testing before commit, I'd like to see a kind of stress test which can be run
continuously that does something like the following in a loop:
- create a table with 10 regions
- insert 10 rows into each region
- pick a random order to delete the regions
- start some threads which perform full table scans to count rows. concurrently, delete each
of the regions in the above random order
- number of rows should drop 100->90->80, etc.
- drop table

If we can run this test continuously, and the test can still succeed even if we periodically
kill the master or one of the RSes, it seems sufficient.
                
> 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 User may want to quickly dispose of out of date records by deleting specific regions.


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