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From "Subbu M Iyer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4213) Support instant schema updates with out master's intervention (i.e with out enable/disable and bulk assign/unassign)
Date Thu, 18 Aug 2011 02:25:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13086745#comment-13086745
] 

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

Ted,

Yes. DELETE_FAMILY also needs to be added. Will take care of that.

>> You meant recursively deleting the children of node /hbase/schema/<table name>,
right ?

Yes.

>> For region server which joins the cluster after the creation of /hbase/schema/<table
name>, it should be able to find out that it already reads the most recent HTD. Does it
create a child node under /hbase/schema/<table name> ?

The newly joined RS will not create a child under /hbase/schema/<table name> as it will
not be processing the schema change event. 




> Support instant schema updates with out master's intervention (i.e with out enable/disable
and bulk assign/unassign)
> --------------------------------------------------------------------------------------------------------------------
>
>                 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: HBASE-4213-Instant_schema_change.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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