What is the best practice for how many seed nodes to have in a Cassandra cluster? I remember reading a recommendation of 2 seeds per datacenter in Datastax documentation for 0.7, but I'm interested to know what other people are doing these days, especially in AWS.
I'm running a cluster of 12 nodes at AWS. Each node runs Cassandra 1.2.5 on an m1.xlarge EC2 instance, and they are spread across 3 availability zones within a single region. To keep things simple I currently have all 12 nodes listed as seeds. That seems like overkill to me, but I don't know the pros and cons of too many or too few seeds. Any advice is appreciated. Thanks! -Ike Walker
