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Posted on 11/26/2021 9:40:59 AM
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One, LoadRunner
1. Overview
LoadRunner is a load testing tool that predicts system behavior and performance. By simulating concurrent load and real-time performance monitoring of tens of millions of users to identify and find issues, LoadRunner is able to test the entire enterprise architecture. By using LoadRunner, organizations can minimize test time, optimize performance, and accelerate the release cycle of their applications. LoadRunner is an automated load testing tool for various architectures that predicts system behavior and evaluates system performance.
2. Function description
1. Virtual users
With LoadRunner's Virtual User Generator, you can easily create system workloads. The engine can be used for LoadRunner performance virtual user simulation testing, and the LoadRunner performance virtual user simulation test is enough to generate virtual users and simulate the business operation behavior of real users in the way of virtual users. It first records the business process (as ordered or ticketed) and then converts it into a test script. With virtual users, you can generate thousands of user visits simultaneously on Windows, UNIX, or Linux machines. Therefore, LoadRunner can greatly reduce the hardware and human resources required for load testing.
Once you have created a test script with the Virtual User Generator, you can parameterize it, which allows you to test your application with several different sets of real-world data that reflect the load capacity of your system. In the case of an order entry process, parameterization replaces fixed data in the record, such as order number and customer name, with variable values. Randomly enter possible order numbers and customer names within these variables to match the operation behavior of multiple actual users.
2. Real load
Once the virtual users are established, you need to set up your load plan, business process portfolio, and number of virtual users. With LoadRunner's Controller, you can quickly organize multi-user test scenarios. The Rendezvous feature of the Controller provides an interactive environment where you can both establish continuous and cyclic loads and manage and drive load testing scenarios.
And, you can leverage its scheduling service to define when users access the system to generate load. This allows you to automate the testing process. You can also use the Controller to qualify your load scenario, in which all users perform an action at the same time--- such as logging into an inventory application ---- simulate peak load. In addition, you can monitor the performance of various components in the system architecture---- including servers, databases, network equipment, etc., ---- to help customers decide on system configuration.
3. Positioning performance
LoadRunner includes an integrated real-time monitor that allows you to observe the performance of your application at any point during the load testing process. These performance monitors provide you with real-time real-time performance of transaction performance data (such as response time) and other system components such as application servers, web servers, network devices, and databases. This allows you to evaluate the performance of these system components from both the customer and server sides during testing, so that problems can be identified faster.
With LoadRunner's ContentCheck TM, you can determine whether your application is functioning properly under load. ContentCheck detects the contents of the application's network packets while running Virtual Users to determine if there is any error content being sent out. Its real-time browser helps you observe program performance from the end-user's perspective.
4. Analyze the results
Once the test is complete, LoadRunner collects and aggregates all test data and provides advanced analysis and reporting tools to quickly identify and trace performance issues back to their causes. With LoadRunner's Web Transaction Detail Monitor, you can see how long it takes to download all images, frames, and text to each page. For example, this transaction detail analysis mechanism can analyze whether an application is slowing down due to a large graphical file or a third-party data component. In addition, the Web Transaction Detail Monitor breaks down the end-to-end response time used on the client, network, and server, making it easy to identify issues and locate the components that are truly wrong. For example, you can break down network latency to determine DNS resolution time, time taken to connect to a server or SSL certificate. By using LoadRunner's analysis tools, you can quickly find out where and why things went wrong and adjust accordingly.
5. Repeat the test
Load testing is an iterative process. Each time you have dealt with an error scenario, you need to load test your application again under the same scenario. This is used to verify whether the fixes you make improve operational performance.
LoadRunner fully supports EJB load testing. These Java-based components run on application servers and provide a wide range of application services. By testing these components, you can identify and resolve potential issues early in application development.
2. Jmeter
Apache JMeter is a Java-based stress testing tool developed by the Apache organization. Used to stress test software, it was originally designed for web application testing but has since expanded to other testing areas. It can be used to test both static and dynamic resources such as static files, Java mini-services, CGI scripts, Java objects, databases, FTP servers, and more. JMeter can be used to simulate huge loads on servers, networks, or objects, test their strength and analyze overall performance under different stress categories. In addition, JMeter is able to do functional/regression testing of the application, verifying that your program returns the results you expect by creating a script with assertions. For maximum flexibility, JMeter allows for the creation of assertions using regular expressions.
Apache jmeter can be used to test the performance of both static and dynamic resources (files, servlets, Perl scripts, java objects, databases and queries, FTP servers, etc.). It can be used to simulate heavy loads on servers, networks, or objects to test their strength or analyze overall performance under different stress types. You can use it for graph analysis of performance or to test your server/script/object with large concurrent loads.
Comparison chart
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