Acer TC.344EU.002 Datasheet download pdf (Page 3)

W H I T E P A P E R / 3

VMware vSphere 5

SnSisrequiredforallvSpherepurchases

W H I T E P A P E R / 3

VMware vSphere 5

Executive Summary

VMware® vSphere® is the industry-leading virtualization platform

for building cloud infrastructures. VMware vSphere accelerates

the shift to cloud computing for existing datacenters. It also

underpins compatible public cloud oerings, paving the way

for the industry’s only hybrid cloud model.

With the introduction of VMware vSphere 5, VMware is evolving

the product’s licensing model to give customers the opportunity

to move to a more cloud-like, “pay for consumption” approach to

IT. The changes lay the foundation for a more modern IT cost model

that is based on consumption and value rather than components

and capacity.

The new vSphere licensing model continues to be based on processor

licenses and eliminates the restrictive physical entitlements of CPU

cores and physical RAM per server, replacing them with a single

virtualization-based entitlement of pooled virtual memory (vRAM).

VMware vSphere Licensing

Overview

In this chapter we will review the details of the new vSphere 5

licensing model.

VMware vSphere 5 Licensing: Per-Processor with

vRAM Entitlements

VMware vSphere 5 is licensed on a per-processor basis with a

vRAM entitlement. Each VMware vSphere 5 processor license

comes with an entitlement to a certain amount of vRAM capacity,

or memory conﬁgured to virtual machines. Unlike in vSphere 4.x

where core and physical RAM entitlements are tied to a server

and cannot be shared among multiple hosts, the vRAM entitlements

of vSphere 5 licenses are pooled, i.e. aggregated, across all vSphere

servers managed by a vCenter Server instance or multiple vCenter

Servers instances in Linked Mode.

Licensing Unit: Per Processor (CPU)

Like VMware Sphere 4.x, VMware vSphere 5 is licensed on a per-

processor basis. Each physical processor (CPU) in a server needs to

have a least one vSphere 5 processor license key assigned to be able

to run vSphere. vSphere 5 license keys can be purchased, deployed

and managed in the same way they were with vSphere 4.x.

No Limits on Physical Resources

VMware vSphere 5 licensing removes all restrictions on physical

cores and physical RAM. This change eliminates barriers to deploying

VMware vSphere on new multicore server conﬁgurations, improving

customers’ ability to choose server hardware that best meets

their requirements.

vRAM Entitlements

Each vSphere 5 license provides a vRAM capacity entitlement.

vRAM is deﬁned as the memory conﬁgured to a virtual machine.

When a virtual machine is created, it is conﬁgured with a certain

amount of memory (vRAM) available to the virtual machine.

The vRAM entitlements of VMware vSphere processor licenses

are pooled—that is, aggregated—across all CPU licenses managed

by a VMware vCenter instance (or multiple linked VMware

vCenter instances) to form a total available vRAM capacity

(pooled vRAM capacity).

There are no restrictions on how vRAM is conﬁgured across virtual

machines and CPUs. At any given point in time, the amount of vRAM

conﬁgured by powered on virtual machines on a CPU could exceed

the base entitlement of the VMware vSphere 5 license assigned to

that CPU. There are also no restrictions on how many VMs can be

run in a pool. As long as the total conﬁgured vRAM across all virtual

machines managed by a VMware vCenter instance or multiple linked

VMware vCenter instances is less than or equal to the total available

vRAM, VMware vSphere is correctly licensed.

vRAM per VM

When a virtual machine is powered on, the vRAM conﬁgured to that

virtual machine counts against the pooled vRAM capacity up to a

maximum of 96GB (i.e. a virtual machine with 128GB of conﬁgured

vRAM will only use 96GB from the pooled vRAM capacity). All

powered on VMs, including virtual appliances or service VMs created

by vSphere features or solutions running on vSphere, count against

the vRAM pool capacity in the amount equal to their conﬁgured

vRAM up to a maximum of 96GB.

Compliance

To maintain licensing compliance, at any given point in time the

following conditions must be met:

•Eachactivephysicalprocessor(CPU)musthaveatleastone

license assigned

•The365-daymovingaverageofdailyhighwatermarkofvRAM

conﬁgured to all powered-on virtual machines in aggregate

cannot exceed the pooled vRAM capacity. This is the same

algorithm used for VMware’s management products licensed

on a per VM basis.

Customers must purchase vSphere licenses in advance of use.

Increasing the Pooled vRAM Capacity

If necessary, the easiest way to expand pooled vRAM capacity is

to add more VMware vSphere CPU licenses of the same edition

to the vRAM pool. Alternatively, customers can upgrade all CPU

licenses in the vRAM pool to a VMware vSphere edition with a

higher vRAM entitlement.

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Acer TC.344EU.002 Datasheet Page 3

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