You have a single HAProxy node in front of the cluster or you have a HAProxy node on each machine that is a client of Cassandra that points at all the nodes in the cluster?
The former has a SPOF and bottleneck (the HAProxy instance), the latter does not (and is somewhat common, especially for things like Apache+PHP). On Tue, Feb 15, 2011 at 4:41 PM, Attila Babo <babo.onl...@gmail.com> wrote: > We are using haproxy in TCP mode for round-robin with great succes. > It's bit unorthodox but has same real added values like logging. > > Here is the relavant config for haproxy: > > ##### > > global > log 127.0.0.1 local0 > log 127.0.0.1 local1 notice > maxconn 4096 > user haproxy > group haproxy > daemon > > defaults > log global > mode tcp > maxconn 2000 > contimeout 5000 > clitimeout 50000 > srvtimeout 50000 > > listen cassandra 0.0.0.0:9160 > balance roundrobin > server db1 ec2-XXX.compute-1.amazonaws.com:9160 check observe layer4 > server db2 ec2-YYY.compute-1.amazonaws.com:9160 check observe layer4 > server db3 ec2-ZZZ.compute-1.amazonaws.com:9160 check observe layer4 >
