Stress tester

The diploma thesis deals with network infrastructure load testing. It’s target is to design and implement a network probe which will be in a form of JMeter plugin one of the components in load tester project. It offers sufficient theoretical basis about load testing, analyzes different types of DoS which can be used to stress the tested infrastructure and also discusses some solutions for load testing realization used in practice. Following is a study of possible ways for realization of the probe with help of several open-source tools. The suitability of individual tools is evaluated from the point of view of the network probe requirements and then the most suitable ones are selected as the basis for it’s implementation. Then, a network probe design is constructed in which it’s functionality is divided into two separated plug-ins, a network probe itself and a server emulator, and the implementation phase is commenced. The implementation is done in Java programming language to allow the new components to use all the neccessary JMeter API functions. The structure of individual parts of the modules as well as many implementation details are analyzed thoroughly in the text. The final chapter of the thesis describes function of the newly created components. After their installation into the load tester the procedure and the results of the functional testing are presented. This thesis describes the whole process of developing a plug-in for JMeter software