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https://issues.apache.org/jira/browse/HBASE-21154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17428331#comment-17428331
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Sean Busbey commented on HBASE-21154:
-------------------------------------
FWIW I think it would benefit us for many reasons to get this into branch-2
releases. However, I would vote against a non-beta release that included this
change currently due to the lack of documentation mentioned earlier in this
jira and tracked by HBASE-21533. We're going on 3 years since that issue's
creation, so I'm not sure it's likely we can get something together in time for
cutting a branch for 2.5.0 RCs at the end of the month.
> Remove hbase:namespace table; fold it into hbase:meta
> -----------------------------------------------------
>
> Key: HBASE-21154
> URL: https://issues.apache.org/jira/browse/HBASE-21154
> Project: HBase
> Issue Type: Improvement
> Components: meta
> Reporter: Michael Stack
> Assignee: Duo Zhang
> Priority: Major
> Fix For: 3.0.0-alpha-1
>
> Attachments: HBASE-21154-v1.patch, HBASE-21154-v2.patch,
> HBASE-21154-v4.patch, HBASE-21154-v5.patch, HBASE-21154-v6.patch,
> HBASE-21154-v7.patch, HBASE-21154.patch
>
>
> Namespace table is a small system table. Usually it has two rows. It must be
> assigned before user tables but after hbase:meta goes out. Its presence
> complicates our startup and is a constant source of grief when for whatever
> reason, it is not up and available. In fact, master startup is predicated on
> hbase:namespace being assigned and will not make progress unless it is up.
> Lets just add a new 'ns' column family to hbase:meta for namespace.
> Here is a default ns table content:
> {code}
> hbase(main):023:0* scan 'hbase:namespace'
> ROW
> COLUMN+CELL
> default
> column=info:d, timestamp=1526694059106,
> value=\x0A\x07default
> hbase
> column=info:d, timestamp=1526694059461,
> value=\x0A\x05hbase
> {code}
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