I currently have 5 VMs on a Vmware 7 Host with Synology NAS iScsi LUN datastore. Then I have another identical setup (1 Host + NAS) running in the same building and use Nakivo to create snapshot-based replicas of my 5 VMs each night. On a couple of occassions I started one of the replica VMs following a operating system crash. Glad to have the VM running again but we lost data from the time the replica was created overnight. Due to the time it takes for Nakivo to perform incrimental replicatas each night I cannot do hourly replicas for example.
I am open to a diffent approach where I might have to set things up differently, but I want to have a realtime replication of my VM environment so that if I have either a VM, Host or Datastore issue, I can switch over to a secondary VM environment with little to no data loss nor downtime. Similar to when you have a Hard drive RAID 1 and one disk fails, you have a mirror on the second drive with everything on it. Im expecting someone to say its doable but you need a special VMware licence for some sort of cluster for your hosts, and a higher model NAS that can do realtime mirroring of the datastore. Has anyone got a setup similar to this, and would like to share your story?
About VM replication between two locations, you must use CDP solutions such as Veeam BR, Zerto, EMC RecoverPoint and some solutions like them.