Hi, I'm not sure if I understand your question correctly, but existing policies can be combined by chaining them, as in `new TokenAwarePolicy(new DCAwareRoundRobinPolicy())`.
-- Olivier Michallat Driver & tools engineer, DataStax On Tue, Sep 22, 2015 at 7:15 PM, Jun Wu <wuxiaomi...@hotmail.com> wrote: > Dear All, > > > > I’m doing some experiment on load balancing policy of Cassandra > (version 2.1.8) and I’m using datastax java driver (version 2.1.7). > Basically, I want test the reading and writing latency or other performance > metrics (I’m not sure which more could be available. If possible, could > someone give me some hints?), using different load balancing policies. The > default policy should be tokenaware wrapped with dcawareroundrobin. > However, there’ll be more like latencyaware and roundrobin. I know > dcawareroundrobin and roundrobin are suitable for multi-DC and single DC. > I’d like to know how to combine different policies to get different > results. Currently I’ve deployed Cassandra in Amazon EC2 in single region > and multiple region. And I’ve used maven to work on java driver on one of > the ec2 instance and write different number of rows, ranging from 1000 to > 10000, 1000000, 1000000 with the default policy. But I don’t know how to > wrap different policies. > > > > Anyone could give some hints? > > > > Thanks! > > > > Steven >
