Re: bloom filter fp ratio of 0.98 with fp_chance of 0.01

2013-03-28 Thread Hiller, Dean
ser@cassandra.apache.org>" mailto:user@cassandra.apache.org>> Date: Thursday, March 28, 2013 3:18 AM To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" mailto:user@cassandra.apache.org>> Subject: Re: bloom filter fp ratio of 0.98 with fp_chance o

Re: bloom filter fp ratio of 0.98 with fp_chance of 0.01

2013-03-28 Thread Alain RODRIGUEZ
Message ----- > From: "Andras Szerdahelyi" > To: user@cassandra.apache.org > Sent: Wednesday, March 27, 2013 1:19:06 AM > Subject: Re: bloom filter fp ratio of 0.98 with fp_chance of 0.01 > > > Aaron, > > > > > What version are you using ?

Re: bloom filter fp ratio of 0.98 with fp_chance of 0.01

2013-03-27 Thread aaron morton
L0 , > would it? > > > > > > > Thanks!! > Andras > > > > > > > From: aaron morton < aa...@thelastpickle.com > > Reply-To: " user@cassandra.apache.org " < user@cassandra.apache.org > > Date: Tuesday 26 March 2013 21:46 >

Re: bloom filter fp ratio of 0.98 with fp_chance of 0.01

2013-03-27 Thread Wei Zhu
the related thread for your reference. -Wei - Original Message - From: "Andras Szerdahelyi" To: user@cassandra.apache.org Sent: Wednesday, March 27, 2013 1:19:06 AM Subject: Re: bloom filter fp ratio of 0.98 with fp_chance of 0.01 Aaron, What version are you using

Re: bloom filter fp ratio of 0.98 with fp_chance of 0.01

2013-03-27 Thread Andras Szerdahelyi
kle.com>> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" mailto:user@cassandra.apache.org>> Date: Tuesday 26 March 2013 21:46 To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" mailto:user@cassandra.apache.org>&

Re: bloom filter fp ratio of 0.98 with fp_chance of 0.01

2013-03-26 Thread aaron morton
What version are you using ? 1.2.0 allowed a null bf chance, and I think it returned .1 for LCS and .01 for STS compaction. Have you changed the bf_ chance ? The sstables need to be rebuilt for it to take affect. > and sstables read is in the skies Not sure what this means. Are you saying it

bloom filter fp ratio of 0.98 with fp_chance of 0.01

2013-03-25 Thread Andras Szerdahelyi
Hello list, Could anyone shed some light on how an FP chance of 0.01 coexist with a measured FP ratio of .. 0.98 ? Am I reading this wrong or are 98% of the requests hitting the bloom filter create a false positive while the "target" false ratio is 0.01? ( Also key cache hit ratio is around 0.0