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https://issues.apache.org/jira/browse/CASSANDRA-3143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13170446#comment-13170446
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Jonathan Ellis commented on CASSANDRA-3143:
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Also note that while we have "one global cache" internally, there's nothing
stopping us from splitting out the different CFs to different save files. In
fact that would be great from a backwards compatibility point of view; there's
users out there who would really hate to blow away their cache on upgrade, and
preserving the save format would avoid the need for a backwards compatibility
mode.
> Global caches (key/row)
> -----------------------
>
> Key: CASSANDRA-3143
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3143
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Pavel Yaskevich
> Assignee: Pavel Yaskevich
> Priority: Minor
> Labels: Core
> Fix For: 1.1
>
> Attachments: 0001-global-key-cache.patch,
> 0002-global-row-cache-and-ASC.readSaved-changed-to-abstra.patch,
> 0003-CacheServiceMBean-and-correct-key-cache-loading.patch,
> 0004-key-row-cache-tests-and-tweaks.patch,
> 0005-cleanup-of-the-CFMetaData-and-thrift-avro-CfDef-and-.patch,
> 0006-row-key-cache-improvements-according-to-Sylvain-s-co.patch,
> 0007-second-round-of-changes-according-to-Sylvain-comment.patch
>
>
> Caches are difficult to configure well as ColumnFamilies are added, similar
> to how memtables were difficult pre-CASSANDRA-2006.
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