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