I'm evaluating the cluster capabilities of Redis 3 (I'm using Redis 2 standalone at the moment), so I am reading the info at http://redis.io/topics/cluster-tutorial.
In this document I read a very important info:
Note that the minimal cluster that works as expected requires to contain at least three master nodes. For your first tests it is strongly suggested to start a six nodes cluster with three masters and three slaves.
Is it really true? In my mind this is correct if I would use sharding capabilities (data are shared between nodes), but what if I don't need it and I would be happy of having data on only one node?
I basically need one master and two slaves (so the cluster would be live if one node fails), can I have this configuration in a production environment? If yes, what are the contraindications?
Thank you very much for your help!