So, cloud scalability and elasticity are important aspects, but your company’s needs and goals will determine if you need both. People accessing your cloud services should not be able to notice that resources are added or dropped. They should just have the confidence that they can access and use resources without interruptions. Physical machines and structures have limits whereas virtual machines are flexible allowing easily for scalability. Virtual machines can be moved to different servers or hosted on multiple servers as an alternative.

scalability and elasticity in cloud computing

Further, it impulsively increases the revenue cost of the organization. Horizontal scalability adds extra resources to scale up the resources in a horizontal row. For example, if you run a business that doesn’t experience seasonal or occasional spikes in server requests, you may not mind using scalability without elasticity.

Diagonal scale is a more flexible solution that combines adding and removing resources according to the current workload requirements. Services on the public cloud may be free, freemium, or subscription-based, wherein you’re charged based on the computing resources you consume. They allow for rapid growth and adaptability to meet changing needs, which is also true for their IT.

Horizontal Vs Vertical Scaling

Everything is controlled by a trigger from the System Monitoring tooling, which gives you this “rubber band” effect. If more capacity is needed now, it is added now and there in minutes. Depending on the system monitoring tooling, the capacity is immediately reduced. Using predefined, tested, and approved images, every new virtual server will be the same as others , which gives you repetitive results. It also reduced the manual labor on the systems significantly, and it is a well-known fact that manual actions on systems cause around 70 to 80 percent of all errors.

  • Although many have been using these technical terms interchangeably, there are several contrasting differences between elasticity and scalability.
  • The example above displays the “horizontal” build of this infrastructure.
  • But they aren’t interchangeable, and as such, shouldn’t be considered synonymous with each other.
  • Dynamic changes can meet with the help of cloud elasticity if the resource needs to maximize or minimized.

They don’t need to buy expensive equipment that will become obsolete in a very brief time. This framework allows WordPress sites to push millions of views if not hundreds of millions. Still, no one could have predicted that you might need to take advantage of a sudden wave of interest in your company.

So, what do you do when you need to be ready for that opportunity but do not want to waste your cloud budget speculating? Existing customers would also revisit old wishlists, abandoned carts, or try to redeem accumulated points. This would put a lot more load on your servers during the campaign’s duration than at most times of the year.


After that, you could return the extra capacity to your cloud provider and keep what’s workable in everyday operations. Now, you may think “that sounds a lot like cloud scalability.” Well, cloud elasticity and cloud scalability are both fundamental elements of the cloud. The big difference between static scaling and elastic scaling, is that with static scaling, we are provisioning resources to account for the “peak” even though the underlying workload is constantly changing.

scalability and elasticity in cloud computing

For application scaling, adding more instances of the application with load-balancing ends up scaling out the other two portals as well as the patient portal, even though the business doesn’t need that. When it comes to the adoption of cloud computing in the enterprise, CIOs and other decision makers must evaluate potential cloud solutions on a number of criteria. Things like cost, performance, security and reliability come up often as key points of interest to IT departments. Joining those criteria at the top of the list of importance are the concepts of scalability and elasticity. Horizontal scaling is the process of adding more instances or resources to meet your growing demands for speed, performance, storage, etc. Vertical scaling, on the other hand, is about increasing the capacity of the existing instance or replacing the existing resources with larger ones.

Cloud Elasticity Vs Cloud Scalability: Why They Matter

Elasticity is essential when there are sudden spikes in activity, or there is an increase in demand. For businesses with large spikes in web traffic and other forms of dynamic workloads, having elasticity is critical. Scalability enables you to add new elements to existing infrastructure to handle a planned increase in demand. Whereas elastically allows you to handle varying demand loads, scalability allows you to increase resources as needed.

scalability and elasticity in cloud computing

It works to monitor the load on the CPU, memory, bandwidth of the server, etc. When it reaches a certain threshold, we can automatically add new servers to the pool to help meet demand. When demand drops again, we may have another lower limit below which we automatically shut down the server. We can use it to automatically move our resources in and out to meet current demand. Depending on the type of cloud service, discounts are sometimes offered for long-term contracts with cloud providers. If you are willing to charge a higher price and not be locked in, you get flexibility.

Elasticity Vs Scalability

For many, the most attractive aspect of the cloud is its ability to expand the possibilities of what organizations — particularly those at the enterprise scale — can do. This extends to their data, the essential applications driving their operations, the development of new apps and much more. Event-driven architecture is better suited than monolithic architecture for scaling and elasticity.

For example, during the holiday season for black Friday spikes and special sales during this season there can be a sudden increased demand on the system. Instead of spending budget on additional permanent infrastructure capacity to handle a couple months of high load out of the year, this is a good opportunity to use an elastic solution. The additional infrastructure to handle the increased volume is only used in a pay-as-you-grow model and then “shrinks” back to a lower capacity for the rest of the year.

Difference Between Elasticity And Scalability In Cloud Computing

It also helps prevent system overloading or runaway cloud costs due to over-provisioning. Horizontal scaling works a little differently and, generally speaking, provides a more reliable way to difference between scalability and elasticity add resources to our application. Scaling out is when we add additional instances that can handle the workload. These could be VMs, or perhaps additional container pods that get deployed.

We re-ran a number of tests to make sure that the variations in results are not caused by configuration differences. The same demand pattern should be executed multiple times to get reliable averages. Some interesting scalability behavior has been noted through the analysis, such as big variations in average response time for similar experimental settings hosted in different clouds. A case of over provision state has been accrued when using higher capacity hardware configurations in the EC2 cloud.

Cloud server elasticity represents more of a tactical approach to allocating computing resources. Elasticity provides the necessary resources required for the current workload but also scales up or down to handle peak utilization periods as well as off-peak loads. Building on our Halloween store example, demand would abruptly end at the end of the month. That is where elasticity comes in — you could ramp down server configurations to meet the lower levels during other periods. Cloud elasticity adapts to fluctuating workloads by provisioning and de-provisioning computing resources. But elasticity also helps smooth out service delivery when combined with cloud scalability.

A booster chlorination facility that is designed to maintain an effective disinfectant residual in water in the distribution system is not a water treatment plant. However, the downside is the limitation of the resource itself, as it only has so much it can scale. Vendor lock-in and danger of downtime are some other possible downsides to consider. Next, let’s see the different types of scaling options available, so you can decide on the optimal one for your business. Learn more about the AWS Well-Architected Framework to build a secure, reliable, and efficient cloud infrastructure.

This also allows for additional sudden and unanticipated sales activities throughout the year if needed without impacting performance or availability. This can give IT managers the security of unlimited headroom when needed. This can also be a big cost savings to retail companies looking to optimize their IT spend if packaged well by the service provider. Cost, security, performance, availability, and reliability are some common key areas to consider. Another criterion that has been added to the list recently is cloud scalability and cloud elasticity. One of the core reasons for migrating to the cloud is its ability to scale.

By default, MongoDB can accommodate several client requests at the same time. In addition, MongoDB employs specific parallel management mechanisms and locking protocols to maintain data integrity at all times. Legacy systems and platforms that are in the process of migrating to hybrid or fully cloud environments require thorough planning to minimize downtime and ensure seamless transition. Generally speaking, a majority of the migration processes from on-prem to cloud or hybrid deployments use some portion of a public cloud capacity for cost optimization.

Resources Provisioning Time

In the above example, under-provisioning the website may make it seem slow or unreachable. Web users eventually give up on accessing it, thus, the service provider loses customers. On the long term, the provider’s income will decrease, which also reduces their profit. With scalability, the business has an infrastructure with a certain amount of room to expand built-in from the outset. This lets the organization increase or decreases its workload size using the existing cloud infrastructure , without negatively impacting performance. This architecture is based on a principle called tuple-spaced processing — multiple parallel processors with shared memory.

Elasticity – generally refers to increasing or decreasing cloud resources. An elastic system automatically adapts to match resources with demand as closely as possible, in real time. A call center requires a scalable application infrastructure as new employees join the organization and customer requests increase incrementally. As a result, organizations need to add new server features to ensure consistent growth and quality performance.

When scaling horizontally or diagonally, you can enjoy highly resilient environments, as one congested machine is immediately substituted for another functioning one. These environments are usually used to perform computing and storage of non-critical functions, like email, CRM, HR, and web. Diagonal type is a hybrid approach where you increase the compute capacity of every single machine to its maximum, but then buy more of them too. This offers the benefits of both approaches while minimizing the risks. Horizontal scaling is used by enterprise level companies and complex applications. It’s limited in scaling capacity and it presents a single point of failure, as all processing happens on one machine.

Elasticity, after all, refers to the ability to grow or shrink infrastructure resources dynamically. As workload changes, cloud elasticity sees the resources allocated at any given point in time changing to meet that demand. This upsizing or downsizing can be more targeted and is often seen in environments where there are a predictable workload and stable capacity planning and performance. Sometimes elasticity and scalability are presented as a single service, but each of these services provides very distinct functionalities. It’s up to each individual business or service to determine which serves their needs best. A use case that could easily have the need for cloud elasticity would be in retail with increased seasonal activity.

Healthcare services were heavily under pressure and had to drastically scale during the COVID-19 pandemic, and could have benefitted from cloud-based solutions. Usually, this means that hardware costs increase linearly with demand. On the flip side, you can also add multiple servers to a single server and scale out to enhance server performance and meet the growing demand. There are an expected number of desktops based on employee population. To ensure the ability to support the maximum number of users and meet SLAs, the amount of services purchased must be enough to handle all users logged in at once as a maximum use case.

Let’s talk about each type in more detail now, starting with vertical scaling. Moving on, this idea of cloud scalability is often confused with elasticity, but in reality, they’re two completely different aspects. To elaborate, a physical machine is typically divided into many “virtual,” or logical machines, using virtualization software. Each VM has its own operating system and functions independently of other VMs. More organizations are moving to the cloud today, and it’s estimated that 94 percent of companies in the world have a presence on the cloud.

Service Offering

Elasticity in cloud computing allows you to scale computer processing, memory, and storage capacity to meet changing demands. Scalability will prevent you from having to worry about capacity planning and peak engineering. Increases in data sources, user requests and concurrency, and complexity of analytics demand cloud elasticity, and also require a data analytics platform that’s just as capable of flexibility. Before blindly scaling out cloud resources, which increases cost, you can use Teradata Vantage for dynamic workload management to ensure critical requests get critical resources to meet demand. Leveraging effortless cloud elasticity alongside Vantage’s effective workload management will give you the best of both and provide an efficient, cost-effective solution.