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https://issues.apache.org/jira/browse/CASSANDRA-6477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14522140#comment-14522140
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Aleksey Yeschenko commented on CASSANDRA-6477:
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bq. Much like with 2i, once that is in place one can utilize the infrastructure
to build other things on top - including materialized views which will need
this to begin with (if the primary key of your materialized view has high
selectivity).
Sorry for a short reply. Just wanted to note that I see this being the other
way around. Full-on materialized views are the infrastructure for 'global
indexes', not the other way around.
> 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.x
>
>
> 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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