When a load testing is conducted, a tester first needs to decide what kind of workload should be applied, that is, load characterized by the number of clients or arrival rate (interarrival time) . For those who always use one tool for load testing, it is better to try other options to get different interpretation of system behaviors.
Tools specify the number of clients:
how many rounds the request scenario will run and Faban specifies how long the test will run.
Tools specify the arrival rate: