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https://issues.apache.org/jira/browse/HBASE-1304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12710436#action_12710436
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Jonathan Gray commented on HBASE-1304:
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I think everyone is in agreement about the future. Any stamp given on anything
(put or delete) that is > now, becomes now.
As far as a Delete at LATEST, yes right now it needs to be an exact match. So,
a Delete at LATEST will likely not do anything. Delete is for a single
version. DeleteColumn is for all versions <= a specified stamp. So if you
want to delete the latest version of something, you don't need to know it's
stamp as long as you don't mind clearing all versions before it. Any time you
want to delete _only_ a single version, you must know and specify the exact
stamp. I think that is fair and understandable, to do otherwise I fear will
sacrifice some of the good properties.
Perhaps we can figure a way to do a single-version delete of the latest version
of a column without affecting older ones. But it seems you'll have to either
actually perform some kind of Get during the delete to figure the stamp, which
there is not currently any of outside of touching Memcache, or all of our
DeleteTracker'ing will need to change how it handles Deletes.
Thoughts from others?
> New client server implementation of how gets and puts are handled.
> -------------------------------------------------------------------
>
> Key: HBASE-1304
> URL: https://issues.apache.org/jira/browse/HBASE-1304
> Project: Hadoop HBase
> Issue Type: Improvement
> Affects Versions: 0.20.0
> Reporter: Erik Holstad
> Assignee: Jonathan Gray
> Priority: Blocker
> Fix For: 0.20.0
>
> Attachments: HBASE-1304-ryan.patch, hbase-1304-v1.patch,
> HBASE-1304-v2.patch, HBASE-1304-v3.patch, HBASE-1304-v4.patch,
> HBASE-1304-v5.patch, HBASE-1304-v6.patch, HBASE-1304-v7.patch
>
>
> Creating an issue where the implementation of the new client and server will
> go. Leaving HBASE-1249 as a discussion forum and will put code and patches
> here.
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