Public, private, or hybrid?
As the push to the cloud continues in verticals ranging from healthcare to content streaming, the simple question of “Public, private, or hybrid?” is one being asked with increasing frequency in IT departments around the world.
Of course, we’re talking about cloud computing.
Cloud has gained incredible traction in the last few years. Right Scale’s 2015 State of the Cloud Survey showed that more than 90% of survey respondents were on the cloud earlier this year. (The survey also found that 68% of enterprises were running less than one-fifth of their application portfolio on cloud infrastructure, showing room for growth.) Here at Telx, we even have the Cloud Xchange, an entire business unit dedicated to making it easy for businesses to choose from a variety of cloud options to address their growing IT needs. Clearly, cloud computing has more momentum than ever.
Even as more and more organizations get on board with cloud, there is significant room for growth in many organizations. The decision of whether to deploy a public, private, or hybrid cloud solution can be a difficult one for even the most experienced companies.
What are the benefits and disadvantages to each solution? Why might a business choose public over private cloud, or hybrid over public or private? Is there a “best” cloud solution?
Below, we’ll take a look at these questions in an attempt to help organizations that are still in the process of choosing the best solution for their business.
Public Cloud: Low Entry Cost, Speed-to-Market, Extremely Scalable
Public cloud is the most widely known solution of the three listed here.
A public cloud is managed by a single external provider like Amazon Web Services (AWS), which is used by millions of people every day. AWS gets most of the attention since they own a vast majority of the market for public clouds and have a deep set of products to choose from, but there are hundreds of other providers. The public cloud can be an inexpensive option for many businesses because resources are pooled together and users pay only for the resources they actually use.
Before the rise of cloud computing, a company in need of more storage or more computing power would need to purchase physical infrastructure (e.g. servers, cabling, power) as well as the technical support needed to back up those additional resources. Public cloud, on the other hand, is typically pay-as-you-go. In the situation described above, the company could simply purchase more storage or computing power through their cloud service provider, giving them a similar end result in a fraction of the time at a fraction of the cost.
Data in a public cloud deployment is logically separated from other users in the cloud, but still all technically housed on the same network, and in most cases the same physical hardware. This differs from an on-premise solution where data would be physically separated.
Public cloud is extremely scalable and relatively inexpensive, but is technically less secure than the private cloud or colocation because your data occupies the same space as other users. When proper precautions are taken, however, the public cloud is much more secure than many people realize.
In short, public cloud deployments are:
With the public cloud under our belts, next, we’ll move to the private cloud.
Private Cloud: More Secure, More Control, More Expensive When Built In-House
Unlike public cloud, a private cloud is a data center and/or network that uses cloud computing technologies.
The obvious benefit of private cloud over a public cloud deployment is security. The business operating the private cloud has complete ownership, control, and maintenance of all the data within the private cloud environment. This is advantageous to companies that have stringent compliance requirements or other concerns about the security of their data.
Enterprises have a few options when deploying a private cloud. While some enterprises choose to purchase their own resources and manage them in their own data center, many more companies deploy private clouds with cloud service providers. In the latter situation, the cloud service provider offers a user fully dedicated hardware, shared hardware, or some combination thereof. So-called “virtual private clouds” use shared hardware, while fully-dedicated hardware more closely mimics an enterprise purchasing and managing its own resources.
Deploying a private cloud within your own data center means that you’ll be faced with many hardware, software, and architectural decisions, as well as challenges pertaining to resources and different skill sets. A private cloud deployment within your own data center is an option if your organization is willing to invest the time and resources necessary to manage it.
To summarize, private cloud deployments are:
Which brings us to the final option: the hybrid cloud.
Hybrid Cloud: The Best of Both Clouds?
Think back to the overviews of public and private clouds above. A public cloud is scalable and quick-to-market, while a private cloud, managed internally, is more secure but less scalable.
Unsurprisingly, a hybrid cloud takes from both public and private deployments and presents a unique third deployment option which is in reality a combination of both. A hybrid cloud utilizes on-premise, colocated, and public and private cloud environments in a mix that best fits a business’ needs. It’s often viewed as the best of both clouds because it allows businesses to build a custom solution and play off of the benefits of each deployment model.
A business, for example, could keep its sensitive data on-premise or in a colocated data center, then deploy resources on the public cloud when it needs computing power quickly. Alternatively, it could host the majority of its resources in a public cloud environment and only use colocated space in a data center for those few things that must remain fully separated.
Hybrid cloud solutions give you the security of the private cloud when you need it, the scalability of public cloud when you need it, and the full security and control of colocation when you need it.
Don’t go building your own hybrid deployment just yet, however. Hybrid cloud requires technical expertise, a clear strategy, relevant skillsets, and ongoing investment to manage properly. A solution that mixes public cloud, private cloud, colocation, and business-run data centers is inherently complicated, and it takes a good bit of skill to be able to give a hybrid deployment the attention it deserves.
When managed properly, however, a hybrid solution can be rewarding. Hybrid cloud deployments are:
Hybrid cloud must be the best of all the solutions listed here, right?
Picking a Winner
Many companies choose a hybrid cloud solution, due in large part to the fact that most organizations have a variety of different needs across different businesses. It’s entirely possible (and common) to have certain aspects of the business in a public cloud environment, others in a private cloud environment, and others on-premise or colocated.
Despite the increased management complexity that comes with deploying a hybrid cloud solution, hybrid solutions are becoming increasingly common these days. An important note, however, is again that what’s best for one business may not be best for another.
Ultimately, the cloud deployment that makes the most sense for an organization will depend entirely on that organization’s needs. For some businesses with fairly straightforward needs, a fully public cloud deployment may be just fine. For others, a fully private cloud deployment may be exactly the answer. Knowing the advantages and disadvantages of each type of cloud deployment, however, can make deploying and maintaining a full-scale solution that much easier.
In short, there’s no clear winner because each type of cloud serves a different purpose. There’s a reason all three continue to proliferate: they all have their own unique applications.
If, having read our overview, you’d like to learn more about the cloud solutions we offer here at Telx or about which cloud model best fits your business’ needs, feel free to reach out to us via the contact page of our site, or by Facebook or Twitter. We’d love to hear from you!