Friday, September 17, 2010

CoolTuts - Performance Testing - Load Runner

Components of Load Runner

1. Virtual User Generator (VuGen): It is used to develop scripts for variety of application types and communication protocols.
Virtual User Script is divided into 3 sections:
  1. Vuser_init: These actions are performed when Vuser is loaded or initialised.
  2. Actions: These actions are performed when Vuser is in "Running" state
  3. Vuser_end: These actions are performed when Vuser finishes or stops.
2. Controller: It is used to manage the test scripts and create scenarios. Scenarios means Scripts, Host Machines and Number of Virtual Users.
3. Analysis: It is used to examine the test Results. It yields a series of graphs and reports that helps summarize and present end-to-end test summary results. We can create cross scenario comparison graphs.
4. Launcher: It provides a single point of access for all load runner components.

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