I need to synch a block device between 5 servers. Only one server will write to the block device and the other three just need to read from it. If this was only between 2 servers, drbd would be perfect, but it's my understanding that drbd will only do 2 or 3 nodes, and I need it to do 5. The replication must be immediate, preferably the primary node not being notified the writes are finished until the data is on all 5 nodes.
Any ideas?
Any ideas?