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From "Benedict (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-8434) L0 should have a separate configurable bloom filter false positive ratio
Date Sat, 06 Dec 2014 15:15:12 GMT
Benedict created CASSANDRA-8434:
-----------------------------------

             Summary: L0 should have a separate configurable bloom filter false positive ratio
                 Key: CASSANDRA-8434
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8434
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Benedict
             Fix For: 2.0.12, 2.1.3


In follow up to CASSANDRA-5371. We now perform size-tiered file selection for compaction if
L0 gets too far behind, however as far as I can tell we stick with the CF configured false
positive ratio, likely inflating substantially the number of files we visit on average until
L0 is cleaned up. Having a a different bf fp for L0 would solve this problem without introducing
any significant burden when L0 is not overloaded.



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