I am setting up SQL mirroing using SQL 2008 r2 servers I will have a principle, mirror and witness running on VMs in an ESXi 4.1 DRS cluster. It seems like I have read somewhere (I cannot find it now) that it is best practice to create a DRS rule to keep the SQL servers on seperate host. Is that a best practice or recommended? If so what is the reasoning behind it?
Thanks