Why does a Distributed LASR Deployment require 4 servers?

[JohnMayner12]

I was wondering why exactly does a Distributed LASR Deployment require a minimum of 4 servers?

https://support.sas.com/documentation/installcenter/en/ikvisanlytofrvssr/73136/HTML/default/index.ht...

In a Distributed LASR deployment, SAS Visual Analytics and SAS Visual Statistics require a minimum of a 4-server, 16-core environment (4 servers X 4 cores) on commodity hardware with Intel Xeon architecture. A minimum of 16 GB of RAM is required per core (256 GB total).

I cannot find any documentation or explanations of why 4 servers are required.

Would anyone know?

[SASKiwi]

I'm guessing that trying to distribute processes across anything less than 4 servers would not be very efficient or effective. You likely be better off going non-distributed with more cores and avoid the overhead of distributing processes entirely.

I'm sure someone like @MargaretC could come up with a much more educated answer...