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Date: Thu, 13 Oct 2011 05:09:12 +0000 (UTC)
From: "Subbu M Iyer (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-4213) Support for fault tolerant, instant
 schema updates with out master's intervention (i.e with out enable/disable
 and bulk assign/unassign) through ZK.
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    [ https://issues.apache.org/jira/browse/HBASE-4213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13126348#comment-13126348 ] 

Subbu M Iyer commented on HBASE-4213:
-------------------------------------

Thanks for your support on this Ted.

Also, on my local (with only one RS), for a 70 region test table I see a more than 100+% improvement in alter performance. 

For a table in a bigger cluster with large number of regions, we should see drastic difference in performance. 

thanks
Subbu 


> Support for fault tolerant, instant schema updates with out master's intervention (i.e with out enable/disable and bulk assign/unassign) through ZK.
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-4213
>                 URL: https://issues.apache.org/jira/browse/HBASE-4213
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Subbu M Iyer
>            Assignee: Subbu M Iyer
>             Fix For: 0.92.0
>
>         Attachments: 4213-101211-Support_instant_schema_changes_through_ZK.patch, 4213-Instant_Schema_change_through_ZK.patch, 4213-V10-Support_instant_schema_changes_through_ZK.patch, 4213-V5-Support_instant_schema_changes_through_ZK.patch, 4213-V7-Support_instant_schema_changes_through_ZK.patch, 4213-V8-Support_instant_schema_changes_through_ZK.patch, 4213-V9-Support_instant_schema_changes_through_ZK.patch, 4213-v9.txt, 4213.v6, HBASE-4213-Instant_schema_change.patch, HBASE-4213_Instant_schema_change_-Version_2_.patch, HBASE_Instant_schema_change-version_3_.patch
>
>
> This Jira is a slight variation in approach to what is being done as part of 
> https://issues.apache.org/jira/browse/HBASE-1730
> Support instant schema updates such as Modify Table, Add Column, Modify Column operations:
> 1. With out enable/disabling the table.
> 2. With out bulk unassign/assign of regions.

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