Elasticity Vs Scalability In Cloud Computing

It aims to avoid the system suffering from a lack of resources based on demand predictions. In short, scalability consists of the ability of a system to be responsive as the demand increases over time. In this tutorial, we’ll study the concepts of scalability and elasticity. These processes typically involved stopping services to modify software configurations and replace the hardware of local servers. In the recent past, adding or removing resources from a computer system was a great challenge.

Scalability vs Elasticity

The response system should be completely computerized to respond to changing demands. Certifications in cloud computing can help clearly define who is qualified to support an organization’s cloud requirements. According to the definition ofcloud computing, as stated by NIST in 2011, Elasticity is considered a fundamental characteristic of cloud computing. In other words, it is the ability of a system to remain responsive during significantly high instantaneous spikes in user load.

Scalability And Elasticity

In this type of scalability, virtual machines are spun up as needed to create new nodes that run containerized microservices. Think of it as adding the same type of services already running to spread out the workload and maintain high performance. With cloud scalability, businesses can avoid the upfront costs of purchasing expensive equipment that could become outdated in a few years. Through cloud providers, they pay for only what they use and minimize waste. The cost savings can really add up for large enterprises running huge loads on servers.

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. All of the modern major public cloud providers, including AWS, Google Cloud, and Microsoft Azure, offer elasticity as a key value proposition of their services.

In this way, we’ll explore characteristics and processes related to systems scalability in the following subsections. Scalability and Elasticity both refer to meeting traffic demand https://globalcloudteam.com/ but in two different situations. Say we have a system of 5 computers that does 5 work units, if we need one more work unit to be done we we’ll have to use one more computer.

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Something can have limited scalability and be elastic but generally speaking elastic means taking advantage of scalability and dynamically adding removing resources. At the risk of stating the obvious, there are distinct differences between elasticity and scalability. This will help determine whether an elastic service or scalability service is the ideal one. Generally speaking, elasticity is an economic concept whose primary purpose is measurement.

It’s up to each individual business or service to determine which serves their needs best. As a general go-to rule, elasticity is provided through public cloud services, while scalability is provided through private cloud services. Elasticity is the ability of a system to manage available resources based on the current workload requirements. Scalability refers to the system’s ability to scale and handle increased needs while still maintaining performance. Essentially, elastically relates to proper resource allocation, and scalability relates to system infrastructure design. However, even when you aren’t using underlying resources, you are often still paying for them.

Doing the opposite, that is removing hardware, is referred to as scaling in. Memory leaks could be an expense killer since cloud providers charge mostly for memory allocation rather than cores. If you have a look to Figure 2 EC2 comparison table, doubling the memory allocation basically doubles the on-demand cost, having almost a lineal relationship between memory and cost. Having more memory allocated is more expensive than getting more cores. Even that elasticity is not the cause of memory leaks or performance issues, dynamic provisioning may hide them at an operational expense.

Scalability vs Elasticity

Consequently, organizations need a way to plan for this effectively and elastically scale with the right infrastructure. It’s important that you have the right CMS architecture in place, such as the headless infrastructure of CrafterCMS. However, with the sheer number of services and distributed nature, debugging may be harder and there may be higher maintenance costs if services aren’t fully automated. With a few minor configuration changes and button clicks, in a matter of minutes, a company could scale their cloud system up or down with ease.

No Performance Degradation

Scaling out or in refers to expanding/shrinking an existing infrastructure’s resources by adding new/removing existing components. Allowing the framework to scale either up or out, to prevent performance demands from affecting it. In some cases whenever the allocated resources are considered unnecessary, the manager can scale down the framework’s capacity to a smaller infrastructure. Instead of paying for and adding permanent capacity to handle increased demand that lasts a few days at a time, they’ll pay only for the few days of extra allocated resources by going with elastic services. This allows sites to handle any unexpected surges in traffic at any given time, with no effects on performance.

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. Tech-enabled startups, including in healthcare, often go with this traditional, unified model for software design because of the speed-to-market advantage. But it is not an optimal solution for businesses requiring scalability and elasticity. This is because there is a single integrated instance of the application and a centralized single database.

Calls to the grid are asynchronous, and event processors can scale independently. With database scaling, there is a background data writer that reads and updates the database. All insert, update or delete operations are sent to the data writer by the corresponding service and queued to be picked up.

Cloud elasticity solves this problem by allowing users to dynamically adapt the number of cloud resources — for example, the number of virtual machines — provisioned at any given time. Horizontal scaling results in more computers networked together and that will cause increased management complexity. It can also result in latency between nodes and complicate programming efforts if not properly managed by either the database system or the application.

When Is Cloud Elasticity Required?

Crafter’s headless+ architecture facilitates these experiences by separating the content authoring and content delivery systems. It also provides developers with an API-first approach that allows them to easily manage, integrate and deliver content to any front-end interface. Marketers aren’t left out in the cold either, like with other headless systems. Instead, they get an easy-to-use interface for creating and editing content, drag & drop experience building, WYSIWYG editors, and in-context preview that make content creation for any digital channel a breeze.

  • Scalability focuses on the general behavior and average workload of a system, trying to predict demands in the medium-term future.
  • To see how CloudZero can help you monitor your costs as you grow and help you build cost-optimized software.
  • We’ll also cover specific examples and use cases, the benefits and limitations of cloud elasticity, and how elasticity affects your cloud spend.
  • New employees need more resources to handle an increasing number of customer requests gradually, and new features are introduced to the system (like sentiment analysis, embedded analytics, etc.).
  • This framework allows WordPress sites to push millions of views if not hundreds of millions.
  • It’s up to each individual business or service to determine which serves their needs best.

In this tutorial, we studied the scalability and elasticity of a computing system. If a system gets more resources than necessary to deal with the current workload, it is involved in an over-provisioning scenario. So, if these resources are obtained in a pay-as-you-go model, wasting them may result in substantial economic losses. When we work on modifying the available resources of a specific computing node, we execute a vertical scaling. Furthermore, scalable systems must tackle the increasing workload without interrupting the provided service. Adapting the availability of computing resources according to the demand is a historical demand in the computing scenario.

Event-driven architecture is better suited than monolithic architecture for scaling and elasticity. That could look like shopping on an ecommerce site during a busy period, ordering an item, but then receiving an email saying it is out of stock. Asynchronous messaging and queues provide back-pressure when the front end is scaled without scaling the back end by queuing requests. There should not a need for manual action if a system is a true cloud.

Conclusion Of Cloud Elasticity In Cloud Scalability

The more effectively you run your awareness campaign, the more the potential buyers’ interest you can expect to peak. Perhaps your customers renew auto policies at around the same time annually. The restaurant often sees a traffic surge during the convention weeks. The restaurant has let those potential customers down for two years in a row. But the staff adds a table or two at lunchtime and dinner when more people stream in with an appetite. The restaurant scales up and down its seating capacity within the confines of the space it occupies.

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System scalability is the system’s infrastructure to scale for handling growing workload requirements while retaining a consistent performance adequately. Consider an online shopping site whose transaction workload increases during festive season like Christmas. In order to handle this kind of situation, we can go for Cloud-Elasticity service rather than Cloud Scalability. As soon as the season goes out, the deployed resources can then be requested for withdrawal. In resume, Scalability gives you the ability to increase or decrease your resources, and elasticity lets those operations happen automatically according to configured rules.


Cloud elasticity is a cost-effective solution for organizations with dynamic and unpredictable resource demands. Scalability enables stable growth of the system, while elasticity tackles immediate resource demands. It comes in handy when the system is expected to experience sudden spikes of user activity and, as a result, a drastic increase in workload demand. Many have used these terms interchangeably but there are distinct differences between scalability and elasticity. Understanding these differences is very important to ensuring the needs of the business are properly met.

By moving off relational, they achieved flexibility and success in meeting regulatory deadlines. The whitepaper introduces basic MarkLogic terms for those readers who might be new to the product and concepts. This guide views MarkLogic through the lens of resource consumption Scalability vs Elasticity and infrastructure planning. This guide describes some of the features and characteristics that make MarkLogic Server scale to extremely large amounts of content. As MarkLogic product manager Justin Makeig says, “Applications are ephemeral—data is forever.”

Scaling Out

Scalability and elasticity are ways in which we can deal with the scenarios described above. It’s more flexible and cost-effective as it helps add or remove resources as per existing workload requirements. Adding and upgrading resources according to the varying system load and demand provides better throughput and optimizes resources for even better performance. It enables companies to add new elements to their existing infrastructure to cope with ever-increasing workload demands.

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