What Is Scalability Testing? Learn With Example

What Is Scalability Testing? Learn With Example

For instance, if you have a database that stores data about all newcomers, a sudden surge of customers could slow things down for everyone. While cheaper than horizontal scaling, the downside to vertical scaling is that you cut into the performance as the components pile up. Compatibility issues also creep up on your infrastructure, along with complexity.

  • Scalability Testing is to measure at what point the software product or the system stops scaling and identify the reason behind it.
  • Fixing a software bug in the production phase can cost up to ten times more when compared to fixing it in the testing phase.
  • In other words, it tests how the system is going to perform during a sudden spike or fall of user request loads.
  • ​Time is taken by a particular webpage to load in an application also matters a lot and affects the overall performance of a website.
  • By determining the server-side robustness and client-side degradation, the organization can then take the required measures to create the best user experience while optimizing infrastructure costs.

Sometimes, the test environment is not always precisely similar to a production environment. It enhances the assurance in a software product to see the future development difficulties. Typically, the memory usage is calculated in respect of the unit bytes.

Salient Features Of Scalability Testing

Another resource utilization under scalability testing is CPU usages, which is used to calculated the CPU utilization while performing application code commands. In scalability testing, Memory usage is one of the resource utilizations used to sustain the memory expended for performing a task by an application. The next feature of scalability testing is performance, which is used to check the user’s repetitively collective load and request under the webserver and repose of the system. Before performing the scalability testing, we must analyze how much memory would be sufficient for the virtual user and load test master. Another type of scalability testing is downward scalability testing.

Last but not least, we spend our R&R being entertained by cloud-streamed movies on 320-by-480 pixel screens. Such is our dependence on these services that any interruption is met with uproarious headlines that spread at epidemic speeds. Using examples from LinkedIn, Netflix, and eBay, we’ll look at some common causes of outages and scaling issues.

Scalability testing

Any size business can benefit from scalability testing, but those prioritizing growth should pay special attention. Since this form of testing covers all levels , you will also be able to pinpoint the source of defects. Scalability testing not only determines the point of application degradation but also tests the system’s ability to accommodate change.

Now the final step is to evaluate the results and prepare the report. For instance, if you expect your website traffic to increase by 200 within two months, you must implement ways to boost your server performance. Scalability testing attributes refer to the performance measurement process concerning the characteristics of a system/app. Scalability testing lets you determine how your application scales with increasing workload. There is no need to store transient data permanently in a database. Store only necessary data that helps improve your business or application.

Thus, scalability testing may be seen as one of the forms of non-functional testing methodologies to ensure the scalable quality of the system. Memory usage refers to the amount of RAM space used for a certain task. When testing this attribute, devs can evaluate the feasibility of memory usage and whether it should be optimized. If testers detect issues with RAM, they should aim for less redundancy, reduction of database hits, and so on. Maybe the memory problems stem from the large number of user requests that overwork your database, in which case you may want to add an extra one. 40% of internet users abandon web pages that take longer than three seconds to load.

Scalability Test Plan

The graph is not proportionate but can still be considered a passed test as initially there is a ramp up phase as the system begins to run, however, as more users are added, there is little change in memory usage. This means that the current memory capacity https://globalcloudteam.com/ can cope with all 3 stages of the test. When creating a new application, it is difficult to accurately predict the number of users in 1, 2 or even 5 years. An issue with an increasing number of users is that it can create new areas of failure.

When running a program, the amount of time that the CPU takes to compile code directly affects throughput. Standards should then be set to minimize the choice of programming language’s effect on the overall scalability of a project. Once your baseline data has been collected, LoadView allows you to turn on the automatic scalability to run the same tests again. You will likely want to add additional upper limit tests because the auto-scaling should continue to perform at levels where the system previously failed. Knowing the limits of your system will allow you to define additional load steps to test each traffic surge.

Scalability testing

At this point, you’ll also need to configure the necessary hardware for execution. When setting your test environment, you’ll need to verify that it can withstand your scalability testing cycles. One of the unique features of LoadView is the ability to run load tests in real browsers.

Advantages And Disadvantages Of Scalability Testing

If the outcome is not proportional, then you will experience bottlenecks with more simultaneous users. You may have to make adjustments to your server, software or hardware to achieve your desired results. After every round of changes, you must perform testing all over again to make sure problems have been properly addressed. In the case of horizontal scaling , a new server to share the load with the incumbent would be introduced to the network. This is a quick way to double or better the performance and capacity of your infrastructure. In order to simulate the loads on your network and applications, provide the testing agent with enough storage and processing resources.

Scalability testing

Therefore, testing scalability helps determine user experience under heavy load when the system is subjected to the stress of upscaling. Scalability Tests help check responsiveness, overall performance, improve application performance metrics, and boost customer experience. Scalability Testing is a non-functional software testing methodology where applications and infrastructures are examined for performance under increased or decreased workload. By determining the server-side robustness and client-side degradation, the organization can then take the required measures to create the best user experience while optimizing infrastructure costs. Throughput is the number of requests an app can process over a unit of time. For web-based applications, throughput is measured based on the number of user requests processed in unit time.

Step3: Test Development

Network usage − It is the measure of the bandwidth consumed by the software product. Its unit is bytes per second, frames received per second, segments received per second, segments sent per second, etc. Usage of compression techniques are of the best programming practices that can help minimize network usage. For example, rather than following a queue mechanism to process users’ requests, developers may write code to process users’ requests whenever the database receives a request. Scalability Testing is defined as the ability of a network, system, application, product or a process to perform the function correctly when changes are made in the size or volume of the system to meet a growing need.

Scalability testing

Sometimes tests that are actually working fine, gets failed in the testing phase due to wrong test scenarios and test scripts cause a waste of time in making unnecessary changes. The testing environment is not always exactly the same as a Production environment and Scalability vs Elasticity hence can result in various issues and different results. It helps to determine the limitations of the web application under test in terms of either Response time, Network Usage, CPU Usage, etc. Searching for any suitable software/ tool for testing the application.

Defining Your Scalability Testing Process

However, scalability testing is a separate and equally important endeavor. In addition, while automated testing makes scalability possible, you still need specific information on how your system scales up and down. The following article will guide you through the basics and give suggestions for how to implement scalability testing.

With all the knowledge you’ve been equipped with, it only makes sense that you know how to get started with the process of scalability testing. Industry best practice entails that you should determine the scope of your project first. The load is the moving variable when conducting most of the tests above.

Attributes Tested In Scalability Testing

Operating System − Analyze the OS that the load generation agents and load test master are compatible with. Once the test development has been performed, we will analyze the recorded results and build the necessary report. It is used to carry the bandwidth consumed by an application under test. Normally, the CPU usage is calculated in respect of the unit Megahertz. Following are the attributes for creating a well-defined Test Plan for Scalability Testing.

In order to ramp up tests on a scalable web application, you need the power and flexibility of a cloud-based load testing platform that LoadView provides. With the EveryStep Web Recorder, you can quickly navigate through your application as any user or visitor would do. Every Scalability testing tool has its unique features to test the Scalability of an application.

If you launch an application or website that performs poorly and frequently fails, your company’s reputation will take the hit and your bottom line will be affected almost instantly. Lack of customer satisfaction and brand damage are things that are very hard to recover from today. This is why it is important to conduct Scalability Testing prior to moving to the production phase. You should ideally have a comprehensive Test Script, that accurately mimics the users’ actions and behaviour.

Scalability Testing is a non functional testing method that measures performance of a system or network when the number of user requests are scaled up or down. The purpose of Scalability testing is to ensure that the system can handle projected increase in user traffic, data volume, transaction counts frequency, etc. The terms scalability, reliability and performance testing are sometimes used synonymously. There is no one-size-fits-all approach to improving scalability; what works best for a small website will not necessarily work for an MMORPG.

CPU Usage is the measurement of the CPU utilization while executing application code instructions. To determine client-side degradation and end user experience under load. To determine how the application scales with increasing workload. Memory − Analyze the memory requirements of the virtual user agent and the load test master.


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