The replication factor is 3, and the consistency level is default, zero. 在 2010年5月24日 上午7:25，Jonathan Shook <jsh...@gmail.com>写道：
> It would be helpful to know the replication factor and consistency > levels of your reads and writes. > > > 2010/5/23 史英杰 <shiyingjie1...@gmail.com>: > > Thanks for your reply! > > //Were all of those 20 nodes running real hardware (i.e. NOT VMs)? > > Yes, there are 20 real servers running in the cluster, and one Casssandra > > instance runs on each server. > > //Did your driver application(s) run on "real" hardware and how many > threads > > did you use? > > The clients run on one server of the 20 servers, I used 10 threads to run > > the write and read tasks. How many threads can make Cassandra get good > > throughput? > > Thanks! > > 2010/5/23 Mark Robson <mar...@gmail.com> > >> > >> 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 > > >
