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https://issues.apache.org/jira/browse/HBASE-4213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13086356#comment-13086356
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Ted Yu edited comment on HBASE-4213 at 8/17/11 2:47 PM:
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I haven't gone through the patch yet.
bq. 5. Master will recursively delete the node /hbase/schema/<table name>, if
the number of childrens of /hbase/schema/<table name> is greater than or equal
to current number of active region servers.
You meant recursively deleting the children of node /hbase/schema/<table name>,
right ?
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> ?
was (Author: yuzhih...@gmail.com):
I haven't gone through the patch yet.
bq. 5. Master will recursively delete the node /hbase/schema/<table name>, if
the number of childrens
of /hbase/schema/<table name> is greater than or equal to current number of
active region servers.
You meant recursively deleting the children of node /hbase/schema/<table name>,
right ?
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> ?
> 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
> 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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