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From "Jack Krupansky (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6477) Materialized Views (was: Global Indexes)
Date Wed, 15 Jul 2015 15:00:09 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14628189#comment-14628189
] 

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

What CL will apply when MV rows are deleted on TTL expiration?

Presumably each of the replicas of the base table will have its TTL expiration triggering
roughly at the same time, each local change presumably triggering a delete of the MV, but
the MV has replicas as well.

Maybe ANY is reasonable for CL for MV update on TTL since the app is not performing an explicit
operation with explicit expectations.

> 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: 3.0 beta 1
>
>         Attachments: test-view-data.sh, users.yaml
>
>
> 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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