Ø LOAD RUNNER
Load Runner is an automated tool used for Performance testing.
There are three main components of Load Runner:
1) Generator
2) Controller
3) Analyzer
A brief scenario of the Load Runner is explained as under:
(1) After the entire planning of the test is complete, output of the plan gives us the click stream document.
(2) We then develop the script in VU Generator by following the instruction given in the click stream documents.
(3) By placing the above recorded script in the controller we prepare a scenario
(4) We then give a run time setting and schedule for a load test. After which we run the test in the Controller and examine all the run time graphs which are generated and displayed
(5) Once the test is completed ,we open the results of the run test with the help of Analyzer and get an over all view of the performance of the application as well a the server response.
ANALYZING A TEST
After the test is ran successfully, we get all the graphs related to the test and clearly summarize the entire test results in numerical data. This graph gives us the picture of the application and the server Performance.
TRACKING THE OUTPUT OF A TEST RUN
Before running the test itself we create a result directory in our machine. In Controller we set this directory in result option. So the controller is advised to store all the output data in this folder
REGENERATING SCRIPT IN LOADRUNNER
After recoding a script, we can enhance it by adding transactions, rendezvous messages, or comments. If we need to revert back to our original script we regenerate it.
This feature is ideal for debugging, or fixing a corrupted script. When we regenerate a script, it removes all the manually added enhancements. If we had added parameters to our script, VU Generator restores the original values. The parameter list however is not deleted; we can reinsert parameters that we created earlier.
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