src/java/org/apache/цassandra/db/DataTracker.java:
public double getBloomFilterFalseRatio()
{
…
return (double) falseCount / (trueCount + falseCount);
…
}ReadCount/WriteCount on CF is for this CF on this node only, so it’s local/internal only reads/writes for the node’s range. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.com<mailto:viktor.jevdoki...@adform.com> Phone: +370 5 212 3063, Fax +370 5 261 0453 J. Jasinskio 16C, LT-01112 Vilnius, Lithuania Follow us on Twitter: @adforminsider<http://twitter.com/#!/adforminsider> Take a ride with Adform's Rich Media Suite<http://vimeo.com/adform/richmedia> [Adform News] <http://www.adform.com> [Adform awarded the Best Employer 2012] <http://www.adform.com/site/blog/adform/adform-takes-top-spot-in-best-employer-survey/> Disclaimer: The information contained in this message and attachments is intended solely for the attention and use of the named addressee and may be confidential. If you are not the intended recipient, you are reminded that the information remains the property of the sender. You must not use, disclose, distribute, copy, print or rely on this e-mail. If you have received this message in error, please contact the sender immediately and irrevocably delete this message and any copies. From: Nicolas Lalevée [mailto:nicolas.lale...@hibnet.org] Sent: Friday, January 25, 2013 16:08 To: user@cassandra.apache.org Subject: JMX CF Beans Just a quick question about the attributes exposed via JMX. I have some doc [1] but it doesn't help about CF beans. The "BloomFilterFalseRatio", is that the ratio of found vs missed, or the ratio of false positive vs the number of tests, or something else ? The "ReadCount" and "WriteCount", how do they count regarding the replication factor ? As far as I understand, the read and write on the StorageProxy is the actual number of requests coming from clients. So judging that the sum on all cf of the read and write is near equal to the replication factor multiply by the number of read and write on the StorageProxy, I am guessing that the read and write per cf are the replicas one. Am I right ? Nicolas [1] http://wiki.apache.org/cassandra/JmxInterface
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