The limitation is on the host level. It is generally a bad idea to give a guest more cores than the host physically has, and in your case, that's closer to 12 than 24 - HT is not a double core technology, it only improves performance and scheduling by a bit, sometimes not at all.

Depending on what the VMs are doing, you might be able to run multiple VMs on the host, going to more assigned virtual CPUs than the host has, distributed among multiple VMs, but never overcommit in a single VM.

On Sat, Feb 8, 2014 at 2:26 PM, Maurice James <midnightsteel@msn.com> wrote:

This may seem like a silly question but, I just need to wrap my head around a concept

Are my VMs limited by host or cluster resources?

4 hosts with the following resources per host:

2 6 core intel processors (24 cores per host)
32GB memory
1.2TB NFS storage

So across the cluster I have
96 cpu cores
128GB memory
4.8TB of NFS storage

Can I create a single VM with let’s say:
25 cpu cores
64GB of RAM
2TB of storage

Am I limited by the host or the cluster? ( Keep in mind that I’m not actually going to create such a ridiculous VM but the question is bothering me). Thanks

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