Hello,
I am not sure what was the exact message you got during Couchbase [UK], but I know many projects that are running Couchbase on VMs (cloud or not), but you have to be sure that your system is “safe”:
- do not put multiple nodes of your cluster on the same hardware: if you lose this hardware you will lose “multiple” nodes of your database and chances are Couchbase can not get the data from replicas during failover
- SAN: same reason need to be sure your do not lose data, and also have good performance to do the I/O (data access , but more importantly all the compaction process)
Regards