Resource Pools

I'm currently looking at VM resource pools in Hyper-V and I'm wondering how they work. I created a pool using:

New-VMResourcePool "Database Engine Services" Processor,Memory,Ethernet

Now, how can I associate a VM to the pool for metering purposes?

When I use Enable-VMResourceMetering, there's no way to associate a VM to a pool. I checked Set-VM as well but I couldn't find a way using that either.

What I would like to have ultimately is a hierarchy of pools for reporting purposes. i.e.

Servers
Servers\Database Engine Services
Servers\Web Application Services
Servers\Reporting Services
Servers\Reporting Services\SSRS

So I could wrap the stats at different levels, depending on what I want to look at. I see that a hierarchy of pool is possible judging by Set-VMResourcePool.

Any help/guidance on this would be appreciated.

Thanks!

Mathieu