Hello forums,
we have a problem understanding what will happen in a split brain situation in our current setup:
Site A:
- 2 Hyper-V Servers (but I guess for the question the type of application does not matter)
- 1 active storage node
Site B:
- 2 Hyper-V Servers (but I guess for the question the type of application does not matter)
- 1 active storage node
So 2 identical sites, each with an active storage node.
The storage is synchronous, so it will only send the ACK to the VM when both nodes have written the data.
Because of a quick interconnect, this performs well.
If the interconnect is broken, both nodes will continue to work and allow the VMs (or whatever wants to write data), to write it's data.
If we now use a disk witness as the tie breaker for the cluster and the interconnect is broken, both sites will see 2 Hyper-V hosts and the quorum lun.
If my understanding is right, then both would assume the majority and start all VMs, which is the worst scenario you can have...
Do we have to use a file share witness on a VM / another Server) or can we somehow prevent such a scenario?