[jira] [Commented] (CASSANDRA-6477) Materialized Views (was: Global Indexes)

["Jack Krupansky (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-6477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14540664#comment-14540664 ] 

Jack Krupansky commented on CASSANDRA-6477:
-------------------------------------------

Still waiting for an updated description for the ticket. In particular, what specific use cases is this feature designed to handle well, and is it definitively expert-only, or will there be use cases that are safe for normal users. The key thing (ha ha!) is whether this feature will provide capabilities to make it much easier for people to migrate from SQL to Cassandra in terms of the denormalization process, and do it in a way that people can pick up easily in Data Modeling 101 training. A couple of examples would help a lot - like test cases.

> Materialized Views (was: 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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