How to Choose the Right Cloud Computing Delivery Model

Private Cloud, Public Cloud, Hybrid Cloud

The debate over cloud computing can be as hotly contested as today’s political debates. One side favors the streamlined, all-access nature of the public cloud, the other favors a more restrictive and controlled environment. All share a desire for increased business agility and innovation.

The great cloud computing debate

In fact, whether it’s a public, private, or hybrid solution, everyone pretty much agrees on the promise of cloud computing: simpler, faster, boundary-less computing with ample scalability, flexibility, predictability, and portability.

They’ll also agree that it’s growing, not slowing, with Gartner reporting that “a recent survey showing most respondents intend to be hybrid, with a weighted average of 64% private and 36% public.”1

But not all clouds are created equal. So how do you choose?

The simple answer is to choose a public cloud for web, test, and development workloads, and private/hybrid cloud for workloads where compliance and control matter. But it’s not always that simple.

According to Gartner, deciding on the best cloud option presents several challenges:2

  • IT organizations lack a decision-making framework for building, deploying and operating workloads on public and private cloud services.
  • IT organizations do not know the costs of service delivery on the private cloud, and therefore cannot optimize their implementation or compare alternatives for placement.
  • Surveys of infrastructure and operations (I&O) leaders point to an overwhelming desire for hybrid cloud computing, yet many are uncertain of how best to implement a hybrid environment.

To help shed some light, Gartner3 has identified four areas where a private or hybrid cloud may make the most sense for your organization:

  1. Choose private cloud where you have stringent SLA delivery or for application performance requirements.
  2. Choose private cloud where you require greater transparency and auditability than the public cloud offers for compliance and regulatory requirements.
  3. Choose private cloud where there is a cost advantage, or where you have recently invested in data centers or infrastructure and you desire a return on your investment.
  4. Choose private cloud for Mode 1 applications with the need for more frequent releases.

There are several ways to implement a private/hybrid cloud. It can be managed within your own environment—either in-house or within a colocation facility—or it can be managed by a service provider. The key is that the resources are all under the care and control of your organization—and are not shared.

In fact, colocation of your critical infrastructure may be a cost-effective option, particularly if meeting SLAs and/or proving compliance are important considerations. Globally located, multi-layer secured IO data centers provide state-of-the-art colocation services and can support your transition to a private cloud (or a hybrid cloud).

Regardless of the option you choose or the vendor you decide to go with, review your services at least annually to make sure that your organization’s needs are being met and you’re still getting what you’re paying for.


1 Source: Gartner, When IT Leaders Should Select Private Over Public Cloud Services, Donna Scott, 17 September 2015.

2 Source: Gartner, When IT Leaders Should Select Private Over Public Cloud Services, Donna Scott, 17 September 2015.

3 Source: Gartner, When IT Leaders Should Select Private Over Public Cloud Services, Donna Scott, 17 September 2015.