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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2012/11/01 03:33:12 UTC

[jira] [Commented] (CASSANDRA-4876) Make bloom filters optional by default for LCS

    [ https://issues.apache.org/jira/browse/CASSANDRA-4876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13488424#comment-13488424 ] 

Jonathan Ellis commented on CASSANDRA-4876:
-------------------------------------------

rebased to http://github.com/jbellis/cassandra/branches/4876-2
                
> Make bloom filters optional by default for LCS
> ----------------------------------------------
>
>                 Key: CASSANDRA-4876
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4876
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>             Fix For: 1.2.0
>
>
> Since LCS gives us only 10% chance we will need to merge data from multiple sstables, bloom filters are a waste of memory (unless you have a workload where you request lots of keys that don't exist).

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