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https://issues.apache.org/jira/browse/CASSANDRA-5357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13870962#comment-13870962
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Jonathan Ellis commented on CASSANDRA-5357:
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We're talking about static CFs aka partition key == primary key, right?
Then there is one row per partition, so there is no need for a special "rows
per partition = all" setting. The case you describe of "wanting to cache a
full table" is not dependent on rows per partition but on cache size = number
of partitions cached.
> Query cache / partition head cache
> ----------------------------------
>
> Key: CASSANDRA-5357
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5357
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Jonathan Ellis
> Assignee: Marcus Eriksson
> Fix For: 2.1
>
> Attachments: 0001-Cache-a-configurable-amount-of-columns-v2.patch,
> 0001-Cache-a-configurable-amount-of-columns.patch
>
>
> I think that most people expect the row cache to act like a query cache,
> because that's a reasonable model. Caching the entire partition is, in
> retrospect, not really reasonable, so it's not surprising that it catches
> people off guard, especially given the confusion we've inflicted on ourselves
> as to what a "row" constitutes.
> I propose replacing it with a true query cache.
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