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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 Thu, 17 Jul 2008 01:40:31 GMT

    [ https://issues.apache.org/jira/browse/HBASE-62?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12614192#action_12614192

stack commented on HBASE-62:

Committed a simplification of migration against this issue.

Previously migration was a 5 step process.  Ensuring each individual step had the right set
of classes to hand proved too much for my small brain. Complexity was compounded by fact that
some classes were self-migrating.  Things got extra messy when test migration did a forward
migrate, junked the version file, and then ran a new forward migration top the old.

To get this patch in, I first stripped migration to a minimum.  Now, the migration script
in TRUNK will only migrate between an hbase 0.1.x install and an hbase 0.2.x install. This
removed one step.  That leaves the addition of the regionhistorian column family and the bloom
filter cleanup.

Plan is to make the migration one-step doing bloomfilter cleanup and migration of HTD, etc.,
all in the one step.

Going forward, we shouldn't be too bad now the important classes all have versions but if
we think we're going to run into this awkward mix of classes in the future, we should do something
like have each step run in its own JVM invocation so we have chance to doctor CLASSPATH per
migration step.

> [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, hbase-62-r677358.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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