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VMware vCloud Director 5.1 Evaluation Guide

The Journey to Private Cloud

Cloud-based infrastructure environments are a frequent topic of discussion within IT organizations today. This

interest stems from several sources. Customers who have broadly adopted virtualization are looking for ways to

further increase their agility. Others are interested in achieving a signiﬁcant reduction in operating costs by

deploying a cloud solution. Still others have heard about cloud infrastructure technologies and are trying to

understand what beneﬁts it can bring to their organization.

The journey that companies have taken with virtualization started with the need to virtualize applications to

reduce server sprawl. Initially, they looked to virtualize applications of low importance, such as those in a

preproduction environment. As time passed, they took the next step in the virtualization journey by virtualizing

more critical applications in their production environments. They soon realized signiﬁcant reductions in

personnel and hardware costs along with increased utilization of computing resources. This led many companies

to adopt a “virtualization ﬁrst” policy, where new applications are considered for deployment in a virtualized

environment before a physical one.

With the adoption of virtualization well underway, companies are now looking forward to the next step in their

virtualization journey: the deployment of a private cloud.

According to a survey of more than 2,000 CIOs taken by Gartner Executive Programs in January 2011,

cloud

computing ranked #1 in their technology priorities. It can be inferred that CIOs are now trying to evolve their

current environments into a highly agile infrastructure to enhance enterprise eciency, reduce expenditures,

and improve the process of implementing or updating business applications.

Simply stated, agility means being able to react more rapidly to business demands. This entails the ability to

quickly respond to requirements for environments that routinely change, as well as to similarly enable

environments that are commonly viewed as static. This is the main purpose of a private cloud–based

infrastructure: to enable agility in the delivery of IT services.

Being virtualized does not equate to the beneﬁts provided by a private cloud. Examining a large number of

virtualized datacenters provides the following two distinct characteristics:

•Ahighdegreeofsharedinfrastructure–Companieshavearchitectedtheirvirtualizedenvironmentswith

storage and network connectivity across large numbers of servers. This enables them to take maximum

advantage of the features in VMware vSphere, such as VMware vSphere vMotion®, VMware vSphere

High Availability (vSphere HA) and vSphere Distributed Resource Scheduler™ (vSphere DRS).

•Theprocessesutilizedtobringnewapplicationsandworkloadsonlineinavirtualizedenvironmentmimicthe

same processes used in physical environments.

IT agility aligns demand (what users require to do the best possible job) with supply (the resources IT can oer).

Ideally, a company evolves to provide services as a supply that will meet the demand of users at any given time.

The risk of not making this evolution is that the demand will ﬁnd another source of supply.

An IT organization can see short-duration, high-demand workloads leak to external providers when its own

supply of resources is unable to meet the demand of its users. Users that go “outside IT” do so to meet deadlines

when they are unwilling or unable to wait out the IT provisioning process. In doing so, however, they are

exposing the company to unintentional risks.

The easiest way to prevent this is to provide a sucient supply of IT resources—delivered within a secure

environment and shielded from risk—to meet user demand. This is the premise of a private cloud: creating a way

for companies to securely automate the matching of user demand with available supply. In doing so, companies

can realize the beneﬁts of IaaS, where end users can have resources allocated on demand in a self-service model.

An interesting by-product of enabling self-service is the change in end-user behavior in regard to the quantity of

resources requested. When end users must go through a lengthy or dicult process to request servers and

applications, they tend to overrequest and are not willing to relinquish what they have obtained.

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