Cloud bursting: A step toward uninterrupted computing

A unique form of hybrid cloud deployment is helping organisations tackle sporadic workloads

A graphic of rainbow matter representing a burst

From storing terabytes of data to providing valuable insights, modern data centres make high-performance computing a breeze. However, business needs are seldom consistent and are subject to change without warning. What’s more, a seasonal spike in application demand can overwhelm servers, disrupting critical business operations.

Businesses often remedy the situation by moving full or partial instances of data and applications to a public cloud. Sizable capital investment goes into the process of purchasing a physical infrastructure capable of handling surplus storage and computing needs. 

Although the new infrastructure is only used during a hike in application demand, operational costs remain constant. Fortunately, cloud bursting offers a solution to this problem. 

What is cloud bursting?

A woman looking at food on a delivery app on her smartphone

Cloud bursting is a configuration within cloud computing which is created by combining the best of what private and public clouds have to offer. This use of cloud resources allows enterprises to meet the high demands in peak times while also not overpaying for unnecessary capacity.

One good example of the use of cloud bursting is in online food delivery services. These have become especially popular in recent months due to lockdown restrictions which allow restaurants to operate only on a takeaway basis. The sector has been especially affected by the pandemic and, in order to remain profitable, an owner may announce a discount in order to boost sales during a time of the day when demand is at its lowest: for example, between 10am and 2pm.

The delivery app, which is usually run on private clouds, reaches peak capacity at 1pm, as customers want to take advantage of the offer while ordering lunch. Faced with a potential system crash due to overload, the app owners can choose to either to resume operations or burst the cloud. The former may seem as a more profitable option, but also has a high risk of a system failure. Bursting the cloud, however, makes it possible for the app to load additional orders so that they can be processed and delivered on time.

Overall, cloud bursting enables businesses to obtain the right amount of cloud required to meet demand at times of above-capacity demand. According to AWS evangelist Jeff Barr, cloud bursting is defined as an application-hosting model that combines pre-existing corporate infrastructure with pay-as-you-go cloud infrastructure to create scalable cloud computing capacity.

"The conservative side advocates keeping core business processes inside of the firewall. The enthusiasts want to run on the cloud. They argue back and forth for a while and eventually settle on a really nice hybrid solution. In a nutshell, they plan to run the steady state business processing on existing systems, and then use the cloud for periodic or overflow processing."

Do all apps work well in a multi-cloud environment?

An image of a bright cloud amidst a dark sky

The modus operandi of cloud bursting architecture might be seen as exemplary — when demand exceeds supply, data and applications are moved to a public cloud to free up space in the primary data centre. Yet, not all applications are created equal. 

It’s important to identify compatible applications across platforms to make cloud bursting work. You must also have a way to analyse trends in traffic spikes. An application delivery controller, or load balancer, is the most efficient way of knowing whether or not your applications are inching toward peak capacity.

Any application that’s configured to support multiple instances simultaneously will prove to be a good fit. As for integration, the fewer ties an application has with other applications, the easier it is to burst. Applications that run static data blend well with both public and private cloud environments. However, dynamic or transactional data requires synchronisation. 

Nearly all high-achieving applications are engineered to resolve latency issues associated with moving between the public and private cloud. The hindrance to cloud bursting mostly comes in the form of setting up security policies. Certain security policies and compliance standards, such as HIPAA, prevent apps and data from leaving the private cloud, making the transfer to a public cloud almost impossible. 

Popular cloud bursting service providers 

A Microsoft Azure web page

Bursting a cloud brings a great deal of agility, saving time and money during rush hours. Since workloads will be monitored across two loud environments at the same time, it’s understandable why cloud bursting is profound and onerous.

Furthermore, keeping the applications consistent for the end-user is an important piece of the puzzle — one that cannot be compromised. 

Here are a few promising cloud service providers to consider, should you wish to make the leap.

Having a service provider manage a hybrid cloud for you goes a long way in helping you call the shots on expanding and recalling services. Based on changes in capacity needs, you can set parameters to automate critical tasks, such as load balancing and scaling. This eliminates the need for costly procurement of resources to meet temporary demand.

The importance of planning ahead

A UX designer using a laptop and a smartphone while planning new webpage layouts

Keeping supply and demand continually balanced is no mean feat. And as IT environments continue to transform and become more sophisticated, the ability to outsource cloud services may become more and more useful, if not necessary. NASA’s Orbiting Carbon Observatory 2 (OCO-2) satellite is a living testimony of the same. 

When faced with an acute challenge of processing petabyte-scale data, NASA had to contemplate the possibility of waiting for 100 days to get the refined data, which meant a $200,000 bill using their on-premise data centre. But NASA decided to go with Amazon Web Services (AWS) instead and achieved the same thing for $7,000 in under six days.

Proactive planning is arguably one of the best approaches to achieving unwavering IT performance. With cloud bursting, enterprises can auto-deploy additional computing resources on public cloud, ensuring that resources in the private cloud remain available and undeterred during a surge in application demand. 

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