Click here to close now.




















Welcome!

@CloudExpo Authors: Mike Kavis, Liz McMillan, Pat Romanski, Don MacVittie, Elizabeth White

Related Topics: @CloudExpo, Microservices Expo, Open Source Cloud, Containers Expo Blog, Agile Computing, Apache

@CloudExpo: Article

Virtual Private Cloud Computing vs. Public Cloud Computing

Which one makes the most sense depends on your requirements

Cloud computing has found its way into many organizations as business leaders and IT departments look to capitalize on the many benefits that cloud offers. As your company considers moving all or part of its IT operation to the cloud, a key decision is whether to rely on public cloud, virtual private cloud, or a combination. Finalizing a cloud strategy must start with understanding your objectives and how they best align with the value each offering can provide.

The public cloud can be characterized by IT resources delivered via the Internet using a standardized, self-service, pay-per-use methodology. Public clouds are designed to provide compute resources virtually at will - similar to that of a utility. Public clouds are highly standardized, allow limited customization, and their respective resources can be oversubscribed and massively shared. Workloads requiring inexpensive storage or compute cycles where known response time to the user community is not critical can be a fit with the public cloud.

Virtual private clouds offer scalable compute resources similar to that of public clouds, but in a more controlled environment. Virtual private cloud providers, especially those with managed services around hosted applications, bring insight into the workload and impacts to the infrastructure. Virtual private cloud providers have the flexibility to customize solutions to meet security and performance requirements. They can also identify where customer data is stored, as in a specific data center or country. The setup allows for more customization and delivers a higher-degree of privacy and security.

As you determine which methodology makes the most sense for your business, here are the three major assessment areas to consider and help guide you in your decision.

Availability Comparison
When it comes to accessing more computing resources, both virtual private and public clouds are designed to provide highly elastic compute power and data storage. When you need more resources, you can request and receive them almost immediately. However, there is a tradeoff since public cloud customers are competing for the same pool of resources. This can impact the cloud experience with unexpected bursts in demand or seasonal type activity. Virtual private cloud providers are able to introduce a level of segmentation to protect workload for a predictable user experience, but still provide the resiliency and flexibility the cloud provides for availability.

Like the public cloud, virtual private cloud services rely on virtualized computing resources to provide elasticity and scale. However, each customer is given its own private pool of resources rather than sharing them. Resources can be expanded, but it is done in a more controlled manner.

Virtual private clouds can offer a degree of elasticity, but also a higher degree of stability than public clouds. This is why virtual private clouds are more attractive for production environments, where the ability to scale is important, but uptime is just as critical.

Another key component to availability is access to the compute resources in the cloud. Traditionally access to the public cloud is done via the Internet. Virtual private cloud providers can be more accommodating for those customers that want to leverage the private line wide area networks currently deployed. With the potential to leverage the Internet as an alternate path to the environment with a dynamic reroute across a hardware-based VPN solution should any carrier issues arise.

Security Comparison
Like any utility, public clouds are easily accessible by the masses. Security controls are in place, but with limits as to how much they can control risk. Public clouds thus can be attractive targets for hackers who enjoy the challenge of breaking into public clouds, which they can then use anonymously to attack other sites.

Virtual private clouds offer more security since computing resources are more logically separated. Where virtual private cloud providers are hosting known applications, tighter security at the network layer can be deployed to further reduce the risk of unnecessary traffic. Security zones and firewall rule sets can be deployed to address multi-tenancy concerns of cloud offerings.

As stated above on availability, there is also a higher degree of security with access to the cloud resources and connectivity. Companies accessing the virtual private cloud via virtual private networks or dedicated circuit can beneficial for firms in highly regulated arenas where enterprise data needs to be protected carefully to demonstrate financial and operational stability to regulators and investors.

Control Comparison
By design, public clouds give users direct control over the volume of computing resources provisioned: you simply provision what you need when you need it. But, you cannot control what other customers in the resource pool access, which may affect your environment and minimize performance predictability.

Public clouds also make modifications to the underlying infrastructure more challenging. For example, if a technical change is needed, such as a software patch or hardware swap, that change impacts everyone because customers are not isolated from each other. Also there is no coordination with the application MTRs running on top of the infrastructure and how the updates may impact functionality. In addition, customers must diligently control the level of computing resources they contract for, monitoring the resources they need and use, and then requesting resources to be turned off when no longer needed; providing less control over computing costs.

Conversely, a virtual private cloud gives you more control over the performance of the technology environment. Customers can work jointly with virtual private cloud providers to adhere to change control policies that may already be established. Resource allocation and load balancing can be finely tuned based on each customer's environment, usage patterns, and resource consumption.

The environment is also more resilient as more sophisticated redundancy and failover capabilities can be incorporated. Virtual private clouds can also more easily provide degrees of data backup for various data retention policies. Customized solutions for disaster recovery customers based on recovery point and recovery time objectives can all be taken into the design criteria for a solution.

Utility and Consistency Requirements Dictate the Ultimate Choice
If your business requires basic computing resources where uptime and system control are not mission-critical, public clouds can serve as an inexpensive method for rapid provisioning of IT infrastructure. As is the case with most utility companies, public cloud providers offer a serviceable, raw platform at a low cost.

But if you want scalability benefits with more control, virtual private cloud services are much more likely to meet your requirements. Virtual private clouds essentially provide a more consistent experience because providers are more in tune with how their customers use the infrastructure and can plan accordingly. This allows for application performance SLAs where customers can shift their focus away from managing the infrastructure and concentrate on their business. Customers receive the benefits of scale and can leverage the cost savings that cloud provides without all the management issues.

More Stories By Kjel Hanson

Kjel Hanson is Director of Infrastructure and Engineering Services at Velocity Technology Solutions, where for the last 14 years he has focused on the delivery of hosting JD Edwards and Infrastructure Managed Services. He has participated in over 75 customer ERP migrations to hosting. Areas of responsibility have included the design and operational delivery of all data center and cloud technologies including network, server platforms, virtualization, and storage.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@CloudExpo Stories
Mobile, social, Big Data, and cloud have fundamentally changed the way we live. “Anytime, anywhere” access to data and information is no longer a luxury; it’s a requirement, in both our personal and professional lives. For IT organizations, this means pressure has never been greater to deliver meaningful services to the business and customers.
"We've just seen a huge influx of new partners coming into our ecosystem, and partners building unique offerings on top of our API set," explained Seth Bostock, Chief Executive Officer at IndependenceIT, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
SYS-CON Events announced today that HPM Networks will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. For 20 years, HPM Networks has been integrating technology solutions that solve complex business challenges. HPM Networks has designed solutions for both SMB and enterprise customers throughout the San Francisco Bay Area.
Learn how you can use the CoSN SEND II Decision Tree for Education Technology to make sure that your K–12 technology initiatives create a more engaging learning experience that empowers students, teachers, and administrators alike.
Container technology is sending shock waves through the world of cloud computing. Heralded as the 'next big thing,' containers provide software owners a consistent way to package their software and dependencies while infrastructure operators benefit from a standard way to deploy and run them. Containers present new challenges for tracking usage due to their dynamic nature. They can also be deployed to bare metal, virtual machines and various cloud platforms. How do software owners track the usag...
As Marc Andreessen says software is eating the world. Everything is rapidly moving toward being software-defined – from our phones and cars through our washing machines to the datacenter. However, there are larger challenges when implementing software defined on a larger scale - when building software defined infrastructure. In his session at 16th Cloud Expo, Boyan Ivanov, CEO of StorPool, provided some practical insights on what, how and why when implementing "software-defined" in the datacent...
As organizations shift towards IT-as-a-service models, the need for managing and protecting data residing across physical, virtual, and now cloud environments grows with it. CommVault can ensure protection and E-Discovery of your data – whether in a private cloud, a Service Provider delivered public cloud, or a hybrid cloud environment – across the heterogeneous enterprise. In his session at 17th Cloud Expo, Randy De Meno, Chief Technologist - Windows Products and Microsoft Partnerships at Com...
SYS-CON Events announced today that VividCortex, the monitoring solution for the modern data system, will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. The database is the heart of most applications, but it’s also the part that’s hardest to scale, monitor, and optimize even as it’s growing 50% year over year. VividCortex is the first unified suite of database monitoring tools specifically desi...
The Software Defined Data Center (SDDC), which enables organizations to seamlessly run in a hybrid cloud model (public + private cloud), is here to stay. IDC estimates that the software-defined networking market will be valued at $3.7 billion by 2016. Security is a key component and benefit of the SDDC, and offers an opportunity to build security 'from the ground up' and weave it into the environment from day one. In his session at 16th Cloud Expo, Reuven Harrison, CTO and Co-Founder of Tufin,...
In their session at 17th Cloud Expo, Hal Schwartz, CEO of Secure Infrastructure & Services (SIAS), and Chuck Paolillo, CTO of Secure Infrastructure & Services (SIAS), provide a study of cloud adoption trends and the power and flexibility of IBM Power and Pureflex cloud solutions. In his role as CEO of Secure Infrastructure & Services (SIAS), Hal Schwartz provides leadership and direction for the company.
SYS-CON Events announced today that MobiDev, a software development company, will exhibit at the 17th International Cloud Expo®, which will take place November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. MobiDev is a software development company with representative offices in Atlanta (US), Sheffield (UK) and Würzburg (Germany); and development centers in Ukraine. Since 2009 it has grown from a small group of passionate engineers and business managers to a full-scale mobi...
There are many considerations when moving applications from on-premise to cloud. It is critical to understand the benefits and also challenges of this migration. A successful migration will result in lower Total Cost of Ownership, yet offer the same or higher level of robustness. In his session at 15th Cloud Expo, Michael Meiner, an Engineering Director at Oracle, Corporation, analyzed a range of cloud offerings (IaaS, PaaS, SaaS) and discussed the benefits/challenges of migrating to each offe...
Digital Transformation is the ultimate goal of cloud computing and related initiatives. The phrase is certainly not a precise one, and as subject to hand-waving and distortion as any high-falutin' terminology in the world of information technology. Yet it is an excellent choice of words to describe what enterprise IT—and by extension, organizations in general—should be working to achieve. Digital Transformation means: handling all the data types being found and created in the organizat...
Chuck Piluso presented a study of cloud adoption trends and the power and flexibility of IBM Power and Pureflex cloud solutions. Prior to Secure Infrastructure and Services, Mr. Piluso founded North American Telecommunication Corporation, a facilities-based Competitive Local Exchange Carrier licensed by the Public Service Commission in 10 states, serving as the company's chairman and president from 1997 to 2000. Between 1990 and 1997, Mr. Piluso served as chairman & founder of International Te...
With SaaS use rampant across organizations, how can IT departments track company data and maintain security? More and more departments are commissioning their own solutions and bypassing IT. A cloud environment is amorphous and powerful, allowing you to set up solutions for all of your user needs: document sharing and collaboration, mobile access, e-mail, even industry-specific applications. In his session at 16th Cloud Expo, Shawn Mills, President and a founder of Green House Data, discussed h...
One of the hottest areas in cloud right now is DRaaS and related offerings. In his session at 16th Cloud Expo, Dale Levesque, Disaster Recovery Product Manager with Windstream's Cloud and Data Center Marketing team, will discuss the benefits of the cloud model, which far outweigh the traditional approach, and how enterprises need to ensure that their needs are properly being met.
The Internet of Everything (IoE) brings together people, process, data and things to make networked connections more relevant and valuable than ever before – transforming information into knowledge and knowledge into wisdom. IoE creates new capabilities, richer experiences, and unprecedented opportunities to improve business and government operations, decision making and mission support capabilities.
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In his session at @ThingsExpo, James Kirkland, Red Hat's Chief Arch...
Malicious agents are moving faster than the speed of business. Even more worrisome, most companies are relying on legacy approaches to security that are no longer capable of meeting current threats. In the modern cloud, threat diversity is rapidly expanding, necessitating more sophisticated security protocols than those used in the past or in desktop environments. Yet companies are falling for cloud security myths that were truths at one time but have evolved out of existence.
Public Cloud IaaS started its life in the developer and startup communities and has grown rapidly to a $20B+ industry, but it still pales in comparison to how much is spent worldwide on IT: $3.6 trillion. In fact, there are 8.6 million data centers worldwide, the reality is many small and medium sized business have server closets and colocation footprints filled with servers and storage gear. While on-premise environment virtualization may have peaked at 75%, the Public Cloud has lagged in adop...