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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-4391) add CF level 'count based ttl' option
Date Thu, 28 Jun 2012 18:06:43 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-4391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis resolved CASSANDRA-4391.
---------------------------------------

       Resolution: Duplicate
    Fix Version/s:     (was: 1.2)

dupes CASSANDRA-3929
                
> add CF level 'count based ttl' option
> -------------------------------------
>
>                 Key: CASSANDRA-4391
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4391
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.2
>            Reporter: Dave Brosius
>            Priority: Minor
>
> It would be useful to have a column family level based ttl for columns based on column
count. This would be both lazy and sloppy, in that the only guarantee you received was that
the latest n columns would not be deleted. 
> When a compaction occurs, only up to n of the latest columns would be added to the new
sstable for any particular key.
> So it is possible that old columns are removed out of order, but again, you can be sure
that the latest n columns are preserved.

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