> Read Count: 68844 [snip] > why reported bloom filter FP ratio is not counted like this >>>> 10/68844.0 > 0.00014525594096798558
Because the read count is total amount of reads to the CF, while the bloom filter is per sstable. The number of individual reads to sstables will be higher than the number of reads to the CF (unless you happen to have exactly one sstable or no rows ever span sstables). -- / Peter Schuller (@scode, http://worldmodscode.wordpress.com)
