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https://issues.apache.org/jira/browse/CASSANDRA-4876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13488465#comment-13488465
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Vijay edited comment on CASSANDRA-4876 at 11/1/12 5:04 AM:
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Hi Jonathan, Looks like there is a bug in http://goo.gl/jPUe0, when
getBloomFilterFpChance return 1.0 we might not store or use BF at all... it
should have been > 0.01 right? same with line #450 not sure i am misreading the
patch.
was (Author: vijay2...@yahoo.com):
Looks like there is a bug in http://goo.gl/jPUe0, when
getBloomFilterFpChance return 1.0 we might not store or use BF at all... it
should have been > 0.01 right? same with line #450 not sure i am misreading the
patch.
> 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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