1. IV&VS Capabilities

2. 2 V IRTUAL USER GENERATOR

3. 3 V IRTUAL U SER T ECHNOLOGY AND ADVANTAGES  Simulates a real user  Requires less resources – machines and people  Greater control over test execution  Can synchronize actions performed by users  Collect and analyze results in a better way  Vusers can communicate directly with a server by executing calls to the server API-without relying on client software  Capture a business transaction by recording user actions performed  Monitors the communication between the application and the server  Generates the required function calls  Inserts the generated function calls into a Vuser script

4. 4 R ECORDING OPTIONS IN L OADRUNNER Here we can primarily:  View the selected protocol(s) and scripting language  Choose the recording mode  HTML  URL  Set think time options  Enable auto correlation To access the recording options, select tools  recording options from the main menu

5. 5 R ECORDING A SCRIPT  Choose Start  All Programs  LoadRunner  Applications  Virtual User Generator  Click on New Vuser  Select the new Virtual User from the list of protocols e.g. Web (HTTP/HTML) Click OK  The required header files are automatically included in the script  Click on the record button and record a sample business flow

6. 6 C ORRELATION Correlation is the technique of capturing data from the server that dynamically change during each run of the script Network Client Req1 Req2 Resp1 for Req1 SessionID_Resp1 = 1111 Resp2 for Req2 SessionID_Resp2 = 2222 Web Server There are 2 types of correlations:  Automatic correlation  Manual Correlation

7. 7 M ANUAL C ORRELATION Manual Correlation is performed by the performance tester manually by inserting the correlation function  Determine the value to capture  Find the right and left boundaries of the value to capture  Find which occurrence of the text boundaries should be used  Add a web_reg_save_param function to the script, above the request whose response contains the value to be correlated  Add the parameter name, left boundary, right boundary, and occurrence to the function  Parameterize the dynamic value in the script every time it occurs  Verify correct execution by replaying the script

8. 8 A UTOMATIC C ORRELATION Automatic Correlation is performed automatically by the tool. Auto correlation can be enabled through the recording options as shown in the figure

9. 9 P ARAMETERIZATION Parameter is a placeholder which replaces a recorded value in a Vuser script with a known value e.g. user ids, passwords etc. At run time, a value from an external source, e.g..csv or.dat file, is substituted for the parameter.

10. 10 P ARAMETERIZATION PROCESS  Right click on the data to be parameterized in the script  Select “Replace with a Parameter”  The Select or Create Parameter dialog box opens.  Type a suitable Parameter Name  Select a Parameter Type and click Ok  Right-click the parameter name in the script and select “Replace More Occurrences” to replace all other occurrences of that data.

11. 11 T RANSACTION Loadrunner Transaction measures the time it takes for the server to respond to specified Vuser requests Steps to insert transactions:  Click the Start Transaction button after selecting the starting point for measurement  Click the End Transaction button after selecting the end point for measurement.  Select Transaction Status (optional) – LR_AUTO, LR_PASS, LR_FAIL Note: LoadRunner Transactions can also be inserted during recording

12. 12 R ENDEZVOUS POINT Rendezvous point is the point of intersection of Vusers during load test. Using rendezvous point we can synchronize Vusers to perform a task at exactly the same moment. Steps to insert rendezvous point:  While recording a Vuser script, click the Rendezvous button on the Recording toolbar. The Rendezvous dialog box opens.  Type a name for the rendezvous point in the Rendezvous Name box

13. 13 T EXT C HECKS Text checks allow us to searches for a text string on a web page which would act as check to indicate the occurrence of the expected web page. You can add the text check either during or after recording. To add a text check during recording:  Click the Insert text check button on the recording toolbar. VuGen adds a web_reg_find function to the script. To add a text check after recording:  Go to the snapshot of the step whose text you want to check.  In the snapshot, select the text you want to verify.  Choose Add a Text Check (web_reg_find) from the right-click menu, type in the text to be verified and click on OK.

14. 14 R UN TIME SETTINGS Here we can set:  Number of iterations for script execution  Think time  Pacing between iterations  Browser to run the script  Proxy settings  Log preferences  Vuser execution type, process/thread  Time outs

15. 15 S CRIPT REPLAY Steps to replay a script in VuGen:  Select Vuser > Run or click button  Click the Output window’s Replay Log tab for a log of all of the actions of the Vuser  To view a summary of the run- time data and the parameters as they are being used, see the Output window’s Runtime Data tab  Observe the runtime viewer to compare the actual results with the expected results