I can’t speak from experience as we’re just getting started in our travels… [10 Unattended in Production and 10 Unattended, 12 Developer in Nonproduction.]
Has some information of hardware requirements to speak to the number of CPUs/RAM you need for up to 250 bots per single Orchestrator instance. It also highlights adjusting the pool size to your SQL Server if necessary.
How many Robots are we talking? If there’s concern wouldn’t it be worthwhile to think about being scalability from the get go, throw an LB in front of orchestrator along with the Redis cluster and add Orchestrator nodes as needed?
If you’re an Enterprise customer… Should be able to reach out to your CSM to get feedback on your inquiry, they’ll either find out the information for you or potentially invite one of their architects to speak about it. You could also ask if their are any other customers that they’re aware of that has gone through this and see if they are willing to share information indirectly or directly with you.