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https://issues.apache.org/jira/browse/CASSANDRA-1878?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-1878:
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Attachment: 1878.txt
patch to re-cache hot keys post-compaction
> Minimize Key Cache Invalidation by Compaction
> ---------------------------------------------
>
> Key: CASSANDRA-1878
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1878
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Tyler Hobbs
> Fix For: 0.6.9, 0.7.0
>
> Attachments: 1878.txt
>
>
> Currently, compactions invalidate key cache entries that pointed to the
> SSTables that were compacted. This results in a sudden increase in the
> number of seeks necessary for reads immediately after compaction. When
> writing out a new SSTable after a compaction, it seems like it should be
> possible to store a list of keys that are currently cached but would be
> invalidated along with their new position in the new SSTable. Matt Dennis
> also seems to think this would be relatively easy to do.
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