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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-1621) merge tool should work on online cluster, but disabled table
Date Mon, 08 Aug 2011 19:38:28 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13081151#comment-13081151
] 

stack commented on HBASE-1621:
------------------------------

I was thinking of an implementation that just ensured that the regions to merge were first
all closed out on the cluster and then it'd create the new merge region and just move the
storefiles from the old regions into place under the new merge region -- then deploy.  No
writing of new store files.  Let any compactions, etc., happen post assign.

> merge tool should work on online cluster, but disabled table
> ------------------------------------------------------------
>
>                 Key: HBASE-1621
>                 URL: https://issues.apache.org/jira/browse/HBASE-1621
>             Project: HBase
>          Issue Type: Bug
>            Reporter: ryan rawson
>            Assignee: stack
>            Priority: Blocker
>             Fix For: 0.92.0
>
>         Attachments: 1621-trunk.txt, HBASE-1621-v2.patch, HBASE-1621.patch, hbase-onlinemerge.patch
>
>
> taking down the entire cluster to merge 2 regions is a pain, i dont see why the table
or regions specifically couldnt be taken offline, then merged then brought back up.
> this might need a new API to the regionservers so they can take direction from not just
the master.

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