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Posted to commits@cassandra.apache.org by "Wei Deng (JIRA)" <ji...@apache.org> on 2016/07/22 20:35:20 UTC

[jira] [Updated] (CASSANDRA-8434) L0 should have a separate configurable bloom filter false positive ratio

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

Wei Deng updated CASSANDRA-8434:
--------------------------------
    Labels: las  (was: )

> 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
>            Reporter: Benedict
>              Labels: lcs
>             Fix For: 2.1.x
>
>
> 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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