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https://issues.apache.org/jira/browse/CASSANDRA-48?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12695177#action_12695177
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Sandeep Tata commented on CASSANDRA-48:
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This'd be great, except we probably want to condition on the timestamp. i.e.,
Get X
Put X+1 if latest timestamp hasn't changed
That makes sure Cassandra doesn't have to to a bit-by-bit compare on an
arbitrarily large value, just compare timestamps.
This is the approach that PNUTS takes. See
http://research.yahoo.com/files/pnuts.pdf
> test-and-set
> ------------
>
> Key: CASSANDRA-48
> URL: https://issues.apache.org/jira/browse/CASSANDRA-48
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Jonathan Ellis
>
> Atomic test-and-set insert operation would be nice: "set value to X but only
> if the current value is still Y." This allows a sort of optimistic
> consistency: perform a GET, then perform test-and-set with the value of that
> GET as Y.
> I do not think that this requires strong consistency to be useful.
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