Load and stress tests belong to the non-functional test category and are used to validate the system under test at varying degrees of load.
As an example one would use a stress test to determine the maximum amount of simultaneous users the system is able to handle inside a given parameter range. Load tests allow to simulate realistic user behavior to test the expected server load before placing a production system online.
With PETA-Load you are able to simulate thousands of user requests in parallel which reenact different business use-cases to validate your hardware configurations prior to going live of the system under test.
PETA-Webrecorder helps you to generate a large amount of test cases in short time.