Re: High Bloom Filter FP Ratio

2014-12-19 Thread Mark Greene
We're seeing similar behavior except our FP ratio is closer to 1.0 (100%). We're using Cassandra 2.1.2. Schema --- CREATE TABLE contacts.contact ( id bigint, property_id int, created_at bigint, updated_at

Re: High Bloom Filter FP Ratio

2014-12-19 Thread Tyler Hobbs
I took a look at the code where the bloom filter true/false positive counters are updated and notice that the true-positive count isn't being updated on key cache hits: https://issues.apache.org/jira/browse/CASSANDRA-8525. That may explain your ratios. Can you try querying for a few non-existent

Re: High Bloom Filter FP Ratio

2014-12-19 Thread Chris Hart
Hi Tyler, I tried what you said and false positives look much more reasonable there. Thanks for looking into this. -Chris - Original Message - From: Tyler Hobbs ty...@datastax.com To: user@cassandra.apache.org Sent: Friday, December 19, 2014 1:25:29 PM Subject: Re: High Bloom Filter