What Is The Difference Between Elasticity And Scalability In Cloud Computing?

😉 So I thought I’d throw my hat into the ring and try my best to explain those two terms and the differences between them. Businesses are turning to the cloud in increasing numbers to take advantage of increased speed, agility, stability, and security. Additionally, the business saves on IT infrastructure and sees other capital and space savings from turning to an external service provider. Scalability enables stable system growth, while elasticity solves variable resource demands. Businesses are investing heavily in cloud computing resources, and professionals with the right set of skills are much in demand. A good use case for Cloud Elasticity that everyone would be able to relate to is streaming services like Netflix.

cloud computing elasticity vs scalability

We note two cases of over-provisioning of MediaWiki software instances for both 200 and 400 demand size, when we used new set of auto-scaling policies – see Fig. Table 7 shows the calculated values for the scalability metrics ηI and ηt for the two demand scenarios for MediaWiki cloud-based systems for both auto-scaling policies options. The corrected volume scalability performance metric, according scalability vs elasticity to Eq. Scalability is crucial for businesses that are growing organically and need to add resources to support employees, infrastructure, or applications. But, what if your computing needs are growing fast and aren’t always predictable? Then you need a cloud provider who can offer cloud elasticity and scalability — helping you keep up with growth requirements and unpredictable demand.


To scale horizontally (or scale out/in) means to add more nodes to a system, such as adding a new computer to a distributed software application. Because a system is elastic, that doesn’t mean it is also scalable. This is why organizations need to rely on infrastructure systems that offer elastic scalability instead.

  • Equation means that the volume of software instances providing the service scale up linearly with the service demand.
  • Some companies have highly predictable growth and consistent computing environments, while others have workloads that fluctuate depending on demand and the time of year.
  • Increase of system resources to meet the future increasing workload demands.
  • Continued improvement and automation of how hardware is provisioned and de-provisioned – even physical hardware – make integrating the hardware and software to provide even better elasticity increasingly functional and common.

Interested to learn more about cloud computing and server-less computing? Read our article «What is Serverless Computing and Why is it Important.» You can also measure and monitor your unit costs, such as cost per customer. Here’s a look at Cloud Xero’s cost per customer report, where you can uncover important cost information about your customers, which can help guide your engineering and pricing decisions. Cloud providers also price it on a pay-per-use model, allowing you to pay for what you use and no more.

What Is Aws Scalability?

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.

cloud computing elasticity vs scalability

Another use case is special sporting events like the Super Bowl that experience much more traffic than regular-season games. Cloud edge solutions are crucial to managing organizational costs while increasing the computing power available to your applications. With website traffics reaching unprecedented levels, horizontal scaling is the way of the future. That’s why you need to make sure that you secure yourself a hosting service that provides you with all the necessary components that guarantee your website’s High Availability. Today, the office is no longer just a physical place – it’s a collection of people who need to work together from wherever they are.

In contrast, Azure shows lower quality scalability than EC2 in this respect, with the metric being 0.45 in the first scenario, and 0.23 for the second scenario. In this study, we perform three kinds of comparisons, one between the same cloud-based software hosted on two different cloud platforms . The second comparison is between two different cloud-based software services hosted on the same cloud platform . The third is between the same cloud-based software service hosted on the same cloud platform with different Auto-scaling polices. For applications with uneven usage, or spikes during periods, having built in elasticity and scalability is crucial. Applications should be designed to detect variations in the real-time demand for resources, such as bandwidth, storage and compute power. Cloud scalability and cloud elasticity allow you to efficiently manage resources.

Types Of Elasticity In Cloud Computing

Cloud elasticity helps users prevent over-provisioning or under-provisioning system resources. Over-provisioning refers to a scenario where you buy more capacity than you need. An elastic cloud service will let you take more of those resources when you need them and allow you to release them when you no longer need the extra capacity.

cloud computing elasticity vs scalability

You can scale up a platform or architecture to increase the performance of an individual server. Simply put, elasticity adapts to both the increase and decrease in workload by provisioning and de-provisioning resources in an autonomous capacity. The outcome makes the CEO, CFO, and head of engineering happy with the entire team and further has eliminated the toil for your team of manually responding to load changes. Elasticity is used to describe how well your architecture can adapt to workload in real time. For example, if you had one user logon every hour to your site, then you’d really only need one server to handle this.


From the Instance Pool Details page click on «More Actions», then on «Create Autoscaling Configuration». For example, with CloudZero, you can see what you are spending, on what, and why. Yet, nobody can predict when you may 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? Perhaps your customers renew auto policies at around the same time annually. The restaurant often sees a traffic surge during the convention weeks. The demand is usually so high that it has to turn customers away.

But cloud elasticity and cloud scalability are still considered equal. But the definition of scalability and elasticity in cloud computing is not complete without understanding the clear connection between both these terms. In truth, what is important to the end-user is not the means but the end. Depending on how much change in demand a system experiences, it is quite possible that adding or deleting application instances can provide the rapid elasticity needed. Continued improvement and automation of how hardware is provisioned and de-provisioned – even physical hardware – make integrating the hardware and software to provide even better elasticity increasingly functional and common.

Scaling beyond these limits usually requires some kind of sharding scheme to spread the load across multiple instances. 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. From the utility-oriented perspective of measuring and quantifying scalability, we note the work of Hwang et al. . Their production-driven scalability metric includes the measurement of a quality-of-service and the cost of that service, in addition to the performance metric from a technical perspective . Related reviews highlight scalability and performance testing and assessment for cloud-based software services, as promising research challenges and directions. In order to try to improve the scalability of any software system, we need to understand the system’s components that effect and contribute to scalability performance of the service.

cloud computing elasticity vs scalability

Horizontal scaling works a little differently and, generally speaking, provides a more reliable way to add resources to our application. Scaling out is when we add additional instances that can handle the workload.

Cloud Computing Mcq

You can take advantage of cloud elasticity in four forms; scaling out or in and scaling up or down. On the other hand, if you delay shrinking, some of your servers would lie idle, which is a waste of your cloud budget. One of the most significant differences between on-premise and cloud computing is that you don’t need to buy new hardware to expand your cloud-based operations as you would for an on-prem system. ZDNet reported that managers need to weigh adaptability heavily when deciding and negotiating for a cloud solution. Internal and external conditions change so rapidly today that a company may need to add or decommission cloud capacity on short notice.

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In general, real-world cloud-based systems are unlikely to deliver the ideal scaling behavior. Cloud Elasticity utilizes horizontal scaling allowing it to add or remove resources as necessary. This method is much more popular with public cloud services, through pay-per-use or pay-as-you-grow. This way, users of this service pay only for the resources they consume.

What Are The Benefits Of Cloud Computing?

According to TechTarget, scalability is the ability on the part of software or hardware to continue to function at a high level of performance as workflow volume increases. In addition to functioning well, the scaled up application should be able to take full advantage of the resources that its new environment offers. For example, if an application is scaled from a smaller operating system to a larger one should be able to handle a larger workload and offer better performance as the resources become available. You’re adding or removing resources, meaning there should be minimal downtime. For example, let’s say you own an online store, and the summer sales are coming.

However, if all of a sudden, 50,000 users all logged on at once, can your architecture quickly provision new web servers on the fly to handle this load? Usually, when someone says a platform or architectural scales, they mean that hardware costs increase linearly with demand. For example, if one server can handle 50 users, 2 servers can handle 100 users and 10 servers can handle 500 users. If every 1,000 users you Systems development life cycle get, you need 2x the amount of servers, then it can be said your design does not scale, as you would quickly run out of money as your user count grew. Scalability handles the scaling of resources according to the system’s workload demands. Consider an online shopping site whose transaction workload increases during festive season like Christmas. So for this specific period of time, the resources need a spike up.