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From "Himanshu Vashishtha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8348) Polish the migration to 0.96
Date Tue, 06 Aug 2013 19:19:48 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13731135#comment-13731135
] 

Himanshu Vashishtha commented on HBASE-8348:
--------------------------------------------

And, I would argue that HBASE-7766 is one of the reason I would vote for nuking all the znodes
and let HBase re-create them. We do need replication znodes to migrate through. I opened HBASE-9141
for that task.
                
> Polish the migration to 0.96
> ----------------------------
>
>                 Key: HBASE-8348
>                 URL: https://issues.apache.org/jira/browse/HBASE-8348
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.95.0
>            Reporter: Jean-Daniel Cryans
>            Assignee: rajeshbabu
>            Priority: Critical
>             Fix For: 0.95.2
>
>         Attachments: HBASE-8348_trunk.patch, HBASE-8348_trunk_v2.patch
>
>
> Currently, migration works but there's still a couple of rough edges:
>  - HBASE-8045 finished the .META. migration but didn't remove ROOT, so it's still on
the filesystem.
>  - Data in ZK needs to be removed manually. Either we fix up the data in ZK or we delete
it ourselves.
>  - TestMetaMigrationRemovingHTD has a testMetaUpdatedFlagInROOT method, but ROOT is gone
now.
> Elliott was also mentioning that we could have "hbase migrate" do the HFileV1 checks,
clear ZK, remove ROOT, etc.

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