Probably it takes in account the read repair, plus a read that have consistency != 1 will produce reads on other machines (which are taken in account). I don't know the internals of opscenter but I would assume that this is the case.
If you want to test it further, disable read_repair, and make all your reads with CL=ONE. Then your client and Opscenter should match. PS: Speculative_retry could also send reads over to more machines. Regards, Carlos Juzarte Rolo Cassandra Consultant Pythian - Love your data rolo@pythian | Twitter: cjrolo | Linkedin: *linkedin.com/in/carlosjuzarterolo <http://linkedin.com/in/carlosjuzarterolo>* Mobile: +31 6 159 61 814 | Tel: +1 613 565 8696 x1649 www.pythian.com On Thu, Apr 23, 2015 at 10:34 AM, Bongseo Jang <grayce...@gmail.com> wrote: > I have cassandra 2.1 + OpsCenter 5.1.1 and test them. > > When I monitored with opscenter 'read requests' graph, it seems the number > on the graph is not what I expected, the number of client requests or > responses. > > I recorded actual number of client request and compare it with graph, then > found they're different. The number on the graph is about 4 times larger > than what the client claimed. > > So, my question is what 'Read Reuqests' on OpsCenter counts exaclty ? > > Thanks ! > > -- > Regards, > Jang. > > a sound mind in a sound body > -- --
