preconfigured job service instances (multiple job services on one job server)

I've heard about a technique making job service highly available by using active and passive (preconfigured and ready to be started) job service instances.

How do we configure job server, specifically QBMServer.Ident_Server, FQDN, QueueName (unique field), to host multiple job services on one job server in 8.1.4?

In the end I'd like to have the following configuration:

JobServer1: Queue1 (active), Queue2 (passive)

JobServer2: Queue1 (passive), Queue2 (active)

JobServer3 (backup site): Queue1 (passive), Queue2 (passive)