[jira] Created: (CASSANDRA-259) LRU cache for key positions

[Jonathan Ellis (JIRA)]

LRU cache for key positions
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                 Key: CASSANDRA-259
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-259
             Project: Cassandra
          Issue Type: New Feature
            Reporter: Jonathan Ellis
            Assignee: Jonathan Ellis


add cache like the old touch cache, but working :)

this will mitigate the performance hit from CASSANDRA-223

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