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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-62) [hbase] Allow user add arbitrary key/value pairs to table and column descriptors
Date Wed, 16 Jul 2008 00:39:31 GMT

    [ https://issues.apache.org/jira/browse/HBASE-62?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12613805#action_12613805
] 

stack commented on HBASE-62:
----------------------------

I've been working on the necessary migration.  Its ugly mixing old and new versions of about
ten classes.  Almost done though.

We could punt bringing in this patch but the migration would still be ugly, just postponed.
 Might be uglier even if lots of on-filesystems in 0.3 hbase.

This (painful) patch opens our easily doing other HTD extensions because it introduces HTD
versioning (e.g. moving table schema out of HTD).  Also adds read-only hbase table.  Its kinda
sweet.

Regards migrations, after bringing in this patch, I think we should start over with migrations;
they're complicated enough now involving 5 distinct steps.  It would mean that you could not
go from old hbase 0.16.x through to 0.3.  You'd have to install 0.2 to bring you up to 0.2
hbase; then install 0.3 hbase to migrate from 0.2 to 0.3.

> [hbase] Allow user add arbitrary key/value pairs to table and column descriptors
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-62
>                 URL: https://issues.apache.org/jira/browse/HBASE-62
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: stack
>            Assignee: Andrew Purtell
>            Priority: Trivial
>             Fix For: 0.2.0
>
>         Attachments: hbase-62-676775.patch, hbase-62-r673356.patch, hbase-62-r673635.patch,
hbase-62-r676786.patch
>
>
> Folks have asked if they can tag columns and tables with markings of their own designation.
 Examples include 'type' and 'descriptiion'. 

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