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https://issues.apache.org/jira/browse/CASSANDRA-6477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14039702#comment-14039702
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Matt Stump commented on CASSANDRA-6477:
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After walking through the various options I can't see a hole in the logic that
[~benedict] outlined in his April 01 comment, and I'm drawn to it's simplicity.
I'm starting on rev1 of an implementation. I'm going to leave out the delete
traffic optimization he mentioned and instead focus on correctness. It might
take me slightly longer than normal as I come up to speed on the codebase.
> Global indexes
> --------------
>
> Key: CASSANDRA-6477
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6477
> Project: Cassandra
> Issue Type: New Feature
> Components: API, Core
> Reporter: Jonathan Ellis
> Fix For: 3.0
>
>
> Local indexes are suitable for low-cardinality data, where spreading the
> index across the cluster is a Good Thing. However, for high-cardinality
> data, local indexes require querying most nodes in the cluster even if only a
> handful of rows is returned.
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