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VMWare vSphere 4.1 licensing

Can someone explain how vmware ESXi 4.1 licsensing works? How we can know that how many licenses we need and what is the criteria? thanks
Avatar of Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
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VMware ESXi is licensed per CPU.

See here for details, today, when another question was asked.

It's available as Standard, Advanced, Enterprise and Enterprise Plus.

So if you got a Dual CPU Server, you'll need two CPU licenses. (doesn't matter about cores)
ESX and ESXi are licensed on per CPU socket basis,

If you have a physical CPU sockets (upto 12 cores), then Enterprise Plus or Advanced Edition licenses are supported.

If you are a CPU with 6 cores, then Standard or Enterprise Edition licenses are supported.

vCenter (Management component) is licensed per instance either as a Foundation or as a Standard license, where Foundation can support upto 5 ESX/ESXi licensed hosts.

vSphere Editions comparison - http://goo.gl/KFjTI
hanccocka - CPU cores definitely matter when you are doing a server consolidation since the number of VMs that can be consolidated can differ based on cores.
@arunraju: I was referring to CPU and Cores with reference to licensing. Not technical things like Server Consilidations, to which we've done thousands, it's our Business!
@arunraju: the question was about licening, not how many cores, I need in my server, or recommend a procesor!
@hanccocka : I wanted the poster to be aware that the editions do have differences in CPU cores as well.
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thanks hanccoka, suppose if i have 2 Hosts each with 2 physical CPUs do i need 4 licenses or two?

And also if a host has 2 sockets but only one has physical CPU and other is empty then do i need 2 licenses or 1 license?
@arunraju: Please note the following

VMware vCenter Server Foundation

Includes license for management of 3 vSphere servers (no CPU limitation). Support and subscription sold separately.

yes, correct cores do make a difference to licensing, I was referring to comment:-

"hanccocka - CPU cores definitely matter when you are doing a server consolidation since the number of VMs that can be consolidated can differ based on cores."

No offence intended.
it's just for physical processors in the host.

So server with 1 processor, and empty socket is 1 CPU license.
so in Advance and Enterprise Plus, i can have upto 12 cores on 1 CPU and only 1 license required for 1 CPU?
so once i figured out Host licenses, do i need seperate licenses for vCenter?

Hanccocka, What do you mean by this "Includes license for management of 3 vSphere servers (no CPU limitation"
To manage your two ESX hosts, you can use VMware vCenter Server Foundation, but this licensed version can only MANAGE up to THREE ESX hosts.
ok thanks does vCenter Server Foundation has its own seperate license key like ESXi host? extra cost?

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Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
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Standard, Advanced, Enterprise and Enterprise Plus.
all the features of Standard, Advanced, Enterprise and Enterprise Plus are provided in the documents above.
Yes, the management server does have an Extra Key, you use at Installation. (or apply afterwards).

The Management Server IS NOT an absolute requirement, only if you require the functionaility. It's easier to use to manage more than one server though in your Server Farm.
Checkout the Starter Packs, it's often cheaper to purchase altogether, than add-on after.
Thanks
No problems, remember ALL are available on evaluations.

Try before you buy.
so if i have more than 3 hosts then how does vCenter foundation license work? do i need another fourndation license which may cover total of 6 host but i may have 4 hosts? do i have to pay for foundation if i increase my hosts from 3 to 4.
yes i have download evaluation version of vsphere 4.1 but not vcentre yet but will do. I was thinkng to first install this on the test servers rather than on actual servers and play for few days. But i was bit disappointed when i tried to install ESXi4.1 on my old HP Proliant DL360 G3 server as it did not install on this may be because it is not 64 bit processor and in 4.1 they have removed support for 32bit processor it used to be with 3.x
vCenter Foundation can only be used to manage three ESX servers.

you cannot add or manage a fourth.

If you want to manage more than 3, you need to purchase a standard vCenter license.

Foundation is intended as a cheaper option for smaller environments.

If you think you are going to exceed 3, that quickly, do not purchase Foundation.
yes, new requirements for vSphere 4.0 64bit processor support only.
any comments on my last post regarding 32bit issue?
Ta
Developments move on I'm afraid, 64bit VMs are becoming more common place, because applications are growing and requiring more memory.

4GB and larger VMs are becoming more common place.

It's really only Intel that have been slow with 64bit technology, we've still got DL385/DL585 G1s, purchased years ago (5+), that have 64bit support, not on the HCL, but still work with ESX 4.0, because AMD have always had 64bit support from very early on.
yes that's true we do have DL585 G2 (AMD Opteron) and it support 64bit and on HCL.

Can you please recommend me some tool either third party of anything which can help me in measuring or calculating exsiting envoinrment (application / network usage on phsyical servers on LAN) equaliant to virtual requirements so that we can plan better that how many hosts we actually need? thanks

What is TCO calculator? is that something what i need for this?
no TCO will not help you. (Total Cost of Ownership).

That's another topic and question about Virtual Requirements, Calculation and Capcaity Planning.
Close this and award points if happy with the response, and post another question and I'll respond that one, rather than going off topic on this one.
ok thanks