I am a one man GIS department and my company is finally taking steps to deploy Enterprise later this year. I am curious to hear any tips, tricks, do’s and dont’s, or general advice that you may have for me. Anything involved with your experience of deploying Enterprise.
I didn't do my organization's initial deployment, but the Federation process really made my predecessor nervous. Ultimately it's basically essential, but have an ESRI rep on hand and make sure you're ready, because unlike many other steps in the deployment, once you federate and actually get your users...using the software, there's no going back without pretty much re-doing the whole dang thing.
As a small GIS department, you may want to install all your ArcGIS Enterprise components onto a single server (known as a Base deployment). In which case I recommend you use the ArcGIS Enterprise Builder. It deals with all those tricky bits like Federation, Web Adaptors, Licensing etc for you.
https://enterprise.arcgis.com/en/get-started/latest/windows/arcgis-enterprise-builder.htm
A good suggestion, however recognize that using the "canned" Enterprise Builder method does limit some organization/site specific configuration settings that may lead to success, failure or inhibit grow out options later on.
If you have a big server with space for many VMs then put one component per VM -- one for Portal, one for Server, one for Datastore, one for your flavor of database server. I ended up with Portal and Web Adaptors and IIS on one, which works fine.
If it were up to me alone, I would put them on Linux and use PostgreSQL as the database but that's me (and I will retire soon). We are a mixed shop here so Esri software runs on Windows. (Our concurrent license manager is on CentOS.)
I don't feel there would be an advantage of using PostgreSQL, but I have more experience with it. Our IT group runs SQL Server and they manage it for us, so we use that.
One of the reasons for one component per VM is snapshot backups. Whenever you call in to Esri support and they hit a broken component that they can't fix, they will say "can you drop back to yesterday's snapshot?" and if the SQL Server is on the same machine, the answer will be "NO, we will lose work".
Another reason is that you will have some license limit on the CPUs and if you have (like us) a 4 CPU limit, you get 4 per machine = 16 vs 4 total for everything.
Interesting about federation. I don't remember that being an issue. Esri support has always been good enough over the phone for us. (Though occasionally they can't help at all.) I can't imagine what it would cost to bring someone in here physically.
Upgrades have always been a pain. I am getting ready to go from 10.9.1 to 11 now. Every time we upgrade, something breaks. Last time, EVERY Web App Builder application stopped working (and no, Esri could not figure it out.) Only the Developer Edition apps survived so that's all we use now.
I am also a one man GIS department and we started using ArcGIS Enterprise in 2016.
I hope that helps.