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https://issues.apache.org/jira/browse/CASSANDRA-6390?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Philip Thompson resolved CASSANDRA-6390.
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Resolution: Duplicate
> Add LOCAL_QUORUM+N consistency
> ------------------------------
>
> Key: CASSANDRA-6390
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6390
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Tupshin Harper
> Priority: Minor
>
> There are a few occasionally requested patterns requested for consistency
> level that are not currently supported by Cassandra, and given the sentiment
> that the most general solution (CASSANDRA-2338) is unlikely to ever make
> sense, I'd like to propose the implementation of at least one additional
> consistency level.
> The specific request that I hear about the most often is to achieve local
> consistency while still ensuring at least one off-site copy.
> Ideally this could be specified as LOCAL_QUORUM + N, where N could range from
> 1 to non-local-DC RF.
> The challenge in implementing this simply today is that the cql protocol and
> the drivers assume that CL is an enum, and you can't make the general case of
> this feature an enum.
> However, it could be quite reasonable to special case LQ+ONE, LQ+TWO, and
> LQ+THREE if it would be prohibitive to change the protocol and drivers.
> For completeness, I'll mention that if it were easy, I would love to also see
> per-DC CL (so you could do stupid things like (DC1=LQ,DC2=1), but this ticket
> is not about that, and there is no obvious way to fit that into the current
> approach.
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