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From Michaël Figuière (JIRA) <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6477) Global indexes
Date Fri, 19 Dec 2014 01:07:16 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14252703#comment-14252703
] 

Michaël Figuière commented on CASSANDRA-6477:
---------------------------------------------

That sounds reasonable indeed as this is just an optimization that doesn't alter the over
semantic of the queries. I've created CASSANDRA-8517 to follow up on this point.

> 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
>            Assignee: Carl Yeksigian
>              Labels: cql
>             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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