Microsoft Licenses

Aamer M
Aamer M used Ask the Experts™
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My question is related to Microsoft Licensing.

I am migrating my environment to windows server 2016 and System Center 2016. I will be having 6 new virtualization hosts with 32 cores each. VMware will be the virtualization platform. I will be hosting 40 virtual machines and have 2000 clients. I will also be having 2 exchange standard servers and one SQL cluster ( 4 Cores) with two nodes Active/Active.

I understand that as per the new Microsoft licensing model I will need the following.

windows server 2016 DC edition  QTY: 12

System Center 2016 Standard: ( I am not sure of the number of licenses I need for system center standard considering 40 Servers and 2000 clients

Exchange server standard: 2

SQL server standard 2014: active active cluster, Two nodes each with 4 cores. It will have two instances basically.

SQL server standard: Single Server to host SCCM and SCOM Databases:

appreciate if I can get some clarity into the licenses I will be buying.

Thanks
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Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Are these Dual Processors with 32 Cores, or 2 x 32 Cores ?

Microsoft OS licensing is now per Core

A minimum of 32 cores need to be licensed per HOST.

It may also be more cost effective to purchase Datacenter licenses.

Author

Commented:
2 processors. 16 cores each.

my confusion is related to system center.

weather to go for datacenter or standard considering my scenereo

Author

Commented:
i will just use sccm and scom

2000 users and 40 servers
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Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Okay, so 2 CPUs, 16 Cores

How many VMs per host server ?

Author

Commented:
Total of 40 vm's and 6 hosts

so almost 7 vm's per host
VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:
Okay....so based on 40 VMs and 6 Hosts...7 VMs per host..

STANDARD

Microsoft Server Licenses is as follows:-

1 x Windows Server® 2016 Standard (16 core) Base License
 
(Additional Cores to be Licensed - 16 )

1 x Windows Server® 2016 Standard Additional License APOS (16 core)


To License Additional Virtual Machines (VM's) 7 per Host

(Additional cores required to license additional VM's      96 additional cores need to be licensed)

6 x Windows Server® 2016 Standard Additional License APOS (16 core)....

Summary per 1 HOST (Standard)

1 x Windows Server® 2016 Standard (16 core) Base License
1 x Windows Server® 2016 Standard Additional License APOS (16 core)
6 x Windows Server® 2016 Standard Additional License APOS (16 core)

So for 6 Hosts

6 x Windows Server® 2016 Standard (16 core) Base License
6 x Windows Server® 2016 Standard Additional License APOS (16 core)
36 x Windows Server® 2016 Standard Additional License APOS (16 core)
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
DATACENTER

 
1 x Windows Server® 2016 Datacenter (16 core)       Base License Required      

(Additional Cores to be Licensed - 16 )

1 x Windows Server® 2016 Datacenter Additional License (16 core)

Summary per 1 HOST (DATACENTER)

1 x Windows Server® 2016 Datacenter (16 core)       Base License Required
1 x Windows Server® 2016 Datacenter Additional License (16 core)

So for 6 Hosts

6 x Windows Server® 2016 Datacenter (16 core)       Base License Required
6 x  Windows Server® 2016 Datacenter Additional License (16 core)

Datacenter Edition includes unlimited virtual instances of the operating system environment (VMs / OSEs) and Hyper-V Containers on the licensed physical server.


So you 7 VMs per host is licensed, and you can increase the number of VMs for FREE!

So obtain costs for

6 x Windows Server® 2016 Standard (16 core) Base License
6 x Windows Server® 2016 Standard Additional License APOS (16 core)
36 x Windows Server® 2016 Standard Additional License APOS (16 core)

versus

6 x Windows Server® 2016 Datacenter (16 core)       Base License Required
6 x  Windows Server® 2016 Datacenter Additional License (16 core)
kevinhsiehNetwork Engineer

Commented:
Why so many hosts and so many cores per host? It looks to me like you can host everything on 2, 3 servers tops. I can run my primary datacenter on 2 hosts, and if I shut off a few VMs or reduce their RAM, I can fit run them all well on a 24 core host. I have 140 VMs in my cluster or so, including 2 large Exchange servers, large file servers, several SQL servers, and a bunch of other random stuff that generates IO. I bought those servers before Microsoft went per core for their licensing. Servers are never above 25% CPU. RAM is at 512 GB per host.

If you go high VM density, your licensing costs are way better. Anything above 16 cores PER HOST costs you more in licensing costs. In addition, you need to have each host licensed for the most VMs it ever runs. This means that your VM count, and licensing requirements go up when you take any host down for maintenance (assuming HA clustering at the hypervisor, or at least vMotion of VMs). With Windows Datacenter licenses, and for System Center Datacenter, you can have as many VMs you want on the hosts, with no incremental licensing cost to Microsoft.

Go to 3 hosts and cut your licensing in half. Go to 2 hosts and cut licensing by 2/3. Whether or not you can go to 2 hosts depends on how much AM you need for all of your VMs, and whether or not the organization is willing to go down to 2 hosts, or 3 would be more appropriate.

Author

Commented:
Cant ask for more.

Based on our sizing the customer has requested as follows

Total hosts required: 4

N+1: makes it : 5

They want 25% free capacity for future expansion: 1 additional Host


so based on this

1. is it enough for me to license 4 hosts? as the 5th will be a maintenance host. 6th we will not use it for now.
2. Does the same formula apply for system center as well?
kevinhsiehNetwork Engineer

Commented:
Your client has a very unusual, very expensive way of sizing their cluster.

With four required hosts, and each host with 32 cores, that's 128 "production cores". 40 VMs / 128 cores = 0.3125 VMs per core. A more standard ratio would be at least 4-8 VMs per core. Unless these machines will be running 3 cores at 100% all the time, the sizing makes no sense. Given the stated workloads, the cluster is way oversized. How is their storage and RAM, because that is way more important than the number of cores they have.

Author

Commented:
is it enough for me to license 4 hosts? as the 5th will be a maintenance host. 6th we will not use it for now.
 2. Does the same formula apply for system center as well?
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
You will need licenses for ALL hosts you run Microsoft OS VMs on.

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