From the official Riak documentation: "In a Riak CS system, any node can respond to client requests - there is no master node and each node has the same responsibilities. Since data is replicated (three replicas per object by default), and other nodes automatically take over the responsibility of failed or non-communicative nodes, data remains available even in the event of node failure or network partition."
Are there experiences if three replicas per object bring some advantages (speed, security) or is it ok to use Riak without replicas (less space)?