2008 R2 RDS Infrastructure Guidance

We are investigating setting up an RDS server with 20 user CALs.
The question I have is... can I set it up RDS on a new instance of 2008 R2, running in a Hyper-V VM if I dedicate enough resources to it?
My google-fu must be slipping, because I keep coming across conflicting answers.
We already have a big 2008 R2 enterprise server in our COLO with a lot of beef in it, so spinning up another VM with a ton of CPU and RAM is not that big of a deal.
Is this possible, or does it violate laws of physics?
Am I about to divide my server by zero?

Thanks in advance!
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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
The answer is "it depends."  Yes, you could spin off a server for RDS application and have 20 users logged without any issues.

It all depends what application(s) would the users be running.  As an example, if your users will be running CAD applications or GIS applications, the display may not be good enough (unless you are running Remote FX), disk IO might be a problem as well as CPU and memory consumption.

If you are going to have your users run Office applications, then sure, no problem.  You have to do a sizing exercise to see how much CPU, memory and disk IO will be required and if requirements can be met then no problem.

I have a demanding application written in Dot.Net with above average disk IO required and I have 30 to 40 users logged on (my server is configured for 8 vCPU and 40 GB RAM).

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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
What applications will be running on the RDSH?

In a Hyper-V setting our general rule of thumb is 512MB to 768MB of vRAM per user. If they are heavy on the browsers then bump that up.

Start with 2 vCPUs and test.

Note that performance can be impacted by assigning more vRAM that spans more than 1 NUMA node and also more vCPUs then there are physical cores on one CPU socket.
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Windows Server 2008

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