On 23 May 2010 13:42, 史英杰 <shiyingjie1...@gmail.com> wrote: > Hi, All > I am now doing some tests on Cassandra, and I found that both writes and > reads on 15 nodes are faster than that of 20 nodes, how many servers does > one Cassandra system contains during the real applications? > Thanks a lot ! > > Yingjie >
I'd ask Were all of those 20 nodes running real hardware (i.e. NOT VMs)? and Did your driver application(s) run on "real" hardware and how many threads did you use? Cassandra can only get good throughput with a lot of client threads, not just a few. Mark
