Stress versus stress testing

Question

What is the difference between stress and stress testing?

Answer 1

Wikipedia when testing the load (bold is mine):

[...] A load test is usually conducted to understand the behavior of a system at a specific expected load . This load may be the expected concurrent number of users for an application performing a certain number of transactions over a specified duration. This test will give the response time of all important business critical transactions. [...]

and stress testing :

understand the upper limits of capacity within the system. This type of test is performed to determine the reliability of the system in terms of extreme load and helps application administrators determine if the system will work enough if the current load is well above the expected maximum .

So, the bottom line: if you are testing the normal expected load (you know that the system will use up to 100 users at a time), this is load testing. But when you want to determine how the system behaves under extreme loads (DoS, Slashdot effect ), and when it breaks, this is stress testing.

Answer 2

The terms stress testing and stress testing are often used interchangeably by software testing engineers, but they are really completely different.

Stress testing

In stress testing, we try to disrupt the system under test by suppressing its resources or taking resources away from it (in this case it is sometimes called negative testing). The main goal of this madness is to make sure that the system is not working and is being restored gracefully - this quality is known as recoverability. OR Stress testing is the process of subjecting your program / system (SUT) to reduced resources, and then examining the behavior of the SUT by running standard functional tests. The idea behind this is to identify problems that do not appear under normal conditions. For example, a multi-threaded program may work normally under normal conditions, but in conditions of reduced CPU availability, synchronization problems will differ and the SUT will crash. The most common types of system resources that are reduced during stress testing are the processor, internal memory, and external disk space. When conducting stress testing, tools are usually called that reduce these three resources: EatCPU, EatMem, and EatDisk, respectively.

While on the other hand load testing

In the case of load testing , load testing is the process of exposing your SUT to heavy loads, usually by modeling multiple users (using the Load runner), where "users" can mean user users or virtual / software users. The most common example of stress testing involves the simultaneous use of a web application or network application by thousands of users. This is usually done by a program that mimics users. There are two main goals of stress testing: determining the performance of the SUT and determining whether the “SUT” breaks gracefully or not.

In the case of a website, you will use load testing to determine how many users your system can handle and still have sufficient performance, as well as determine what happens with extreme load - whether the website is “too busy” for users, or will the web server crash?

Answer 3

Load Testing: The load test is designed to test the system by continuously and steadily increasing the load on the system until the limit is reached.

Example For example, to test the email functionality of an application, it can be flooded with 1000 users at a time. Now 1000 users can start email transactions (read, send, delete, forward, reply) in various ways. If we take one transaction per user per hour, it will be 1000 transactions per hour. By simulating 10 transactions / users, we could load a test email server, occupying 10,000 transactions / hour.

Stress testing: During stress testing, various actions to overload existing resources with redundant tasks are performed in an attempt to destroy the system.

Example: For example, a word processor such as Writer1.1.0 from OpenOffice.org is used in developing letters, presentations, spread sheets, etc. The goal of our stress testing is to download it with a lot of characters.

To do this, we will repeatedly insert a row of data until we reach the threshold limit for processing a large amount of text. Once a character reaches 65535 characters, it simply refuses to accept more data. The result of stress testing on Writer 1.1.0 gives a result that does not fall under stress and that it copes with the situation gracefully, so make sure that the application works correctly even under severe stress conditions.

Answer 4

-> Testing an application with the maximum number of users and input is defined as load testing . When testing an application with the maximum number of users and input, it is defined as stress testing .

-> In stress testing, we measure system performance based on user volume. While in stress testing we measure the breakpoint of the system.

-> Load Testing tests the application for given load requirements, which may include any of the following criteria:

.Total number of users. .Response Time .Through Put 

Some options for checking the status of servers / applications.

-> While stress testing checks the application for an unexpected load. It includes

  .Vusers .Think-Time 

Example:

If the application is designed for 500 users, then for load testing we check up to 500 users, and for stress testing we check more than 500.

Answer 5

Test loading = setting a certain amount of load on the server for a certain time. 100 concurrent users in 10 minutes. Ensuring software stability. Stress testing = constantly increase the load until the software crashes. 10 concurrent users increase every 2 minutes until the server crashes.

To make a comparison with weight lifting: you are "maximum" weight to see what you can do for 1 rep (stress testing), and then with regular training you do 85% of your maximum value for 3 sets of 10 reps (stress testing )

Answer 6

Load testing: - Load testing is designed to test the system by constantly and continuously increasing the load on the system until the threshold limit is reached.

Stress testing - During stress testing, various actions for overloading existing resources with the help of redundant tasks are performed in order to destroy the system.

The main difference is that when

Click here to see the exact difference.

Answer 7

Load testing: Too many users Stress testing: Too many users, too much data, too little time and too little space

Answer 8

Download - S / W test at maximum load. Stress - beyond load S / W.Or To determine the break point s / w.