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https://issues.apache.org/jira/browse/CASSANDRA-3497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13278356#comment-13278356
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Brandon Williams commented on CASSANDRA-3497:
---------------------------------------------
Note for others trying to disable their BF: despite earlier discussion on this
ticket, zero is NOT disabled, but instead sets it back to the default, since 0
false positives is invalid. You actually want to set it to 1 to have the
smallest possible filter.
> BloomFilter FP ratio should be configurable or size-restricted some other way
> -----------------------------------------------------------------------------
>
> Key: CASSANDRA-3497
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3497
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Brandon Williams
> Assignee: Yuki Morishita
> Priority: Minor
> Fix For: 1.0.7
>
> Attachments: 0001-Add-bloom_filter_fp_chance-to-cli.patch,
> 0001-give-default-val-to-fp_chance.patch, 3497-v3.txt, 3497-v4.txt,
> CASSANDRA-1.0-3497.txt
>
>
> When you have a live dc and purely analytical dc, in many situations you can
> have less nodes on the analytical side, but end up getting restricted by
> having the BloomFilters in-memory, even though you have absolutely no use for
> them. It would be nice if you could reduce this memory requirement by tuning
> the desired FP ratio, or even just disabling them altogether.
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