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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8434) L0 should have a separate configurable bloom filter false positive ratio
Date Tue, 20 Jan 2015 17:09:47 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

T Jake Luciani updated CASSANDRA-8434:
--------------------------------------
    Fix Version/s:     (was: 2.0.12)
                   2.0.13

> 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: 2.1.3, 2.0.13
>
>
> 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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