Dear Sir,
We are planning to move on SQL server 2008 R2 to SQL Server 2016 with DR support and larger infrastructure. At present we are going for 12 DB servers 8 core each on cloud(VMs). Same is for DR setup also. DR DB servers are in high availability groups to sync data from Primary servers. How many SQL licenses we will need to setup this requirement. As per my understanding we need to by 12*8/2=48 SQL Server 2016 licenses but the vendor is proposing same number of licenses for DR site also.
At DR site we are doing nothing with DB servers but servers are in High Availability Groups for failover. Is it mandatory to buy SQL Server 2016 licenses for DR site also. Please guide.