This allows you to run a unlimited number of virtual machines, your hardware is the limit! The number of cores does not matter. When you are using VMotion or a technology alike virtual instances are not bound to a physical host. Licenses for these virtual instances however are bound to these physical hosts! In a non-VMotion setup you purchase a license for every virtual instance. This license is applied to the physical host this virtual instance is running on.
Since the virtual instance is bound to the physical host you can apply the number of licenses for the virtual hosts one to one. For example. You need to license for the maximum number of VMs that will be on a physical host ESX at any given moment. This results in a average of 10 servers and a theoretical maximum of even more servers, maybe even 20 depending on server hardware? Does anyone know hoe MS handles this number? The licensing would look like:.
We need 20 licenses for every physical host because at any given moment each of the three physical hosts can run 20 virtual instances. This licensing restriction, and the unclear maximum number of virtual instances per physical host when using VMotion makes the licensing based on the Datacenter edition very cost efficient if not even necessary. In both scenarios, regardless of whether the workloads are running in physical or virtual OSEs, each server must have the appropriate number of licenses assigned to it prior to the workload running on it.
This holds true regardless of whether you plan the workload to:. If you run a hypervisor on Windows Server for example Hyper-V of VMware Server you are allowed to use the same license for the OS running directly on the metal physical and for the maximum number of Virtual Machines that version of Windows allows std: 1, ent: 4, DC: unlimited. However there are some limitations:. This means you are not allowed to use this physical installation of Windows for other purposes!
This is software. As always though, I would recommend talking to your reseller, or a Microsoft licensing specialist to avoid any trouble. Pretty much what IT cowboy said, except to clarify that Datacenter is licensed per socket CPU , so for what might be a typical 2 CPU server who cares how many cores you'd buy 2 Datacenter licenses and could cram as many instances of server on the box as you wanted.
Yes, I Should have commented that for R2 was what I was talking about. Server does work with cores first, then vm's second in a not too complicated, more complicated manner. I will put them here anyway so other may see the difference. Now I am unsure as to the licensing if you are using downgrade rights to run R2, but I suspect that in that case they will require the newer licensing scheme.
You can assign multiple Standard licenses to "stack" rights to run multiple VMs. Just bear in mind these licences are still assigned to the physical server and you can't float them around, so you'll need enough to cover the maximum number of VMs your server could be running at any one time. To continue this discussion, please ask a new question.
Remove From My Forums. Answered by:. Archived Forums. Sign in to vote. Sunday, March 6, PM. You can use more 4 VM's with this license. Nirmal Madhawa Thewarathanthri.
Monday, March 7, AM. Wednesday, March 9, AM. Thanks for the answers on the first part - to answer your question as to where I purchased the license, it wasn't actually purchased but was part of a class that I took online a couple of years ago.
I believe it was part of an enterprise agreement between the people offering the class and Microsoft. I have been unable to track down the document I had saved the key on, so am trying to extract my key from the activated installation I am currently running.
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