Understanding the Variable Fidelity Playback in eValid

Use and application of the eValid server loading (LoadTest) capability. And in the cloud computing context for monitoring and loading.

Understanding the Variable Fidelity Playback in eValid

Postby JCorrey » Thu Feb 03, 2022 7:38 am

Morning.

What is Variable Fidelity Playback in eValid LoadTest Mode?

Please explain what this does.

Thanks
JCorrey
 
Posts: 1
Joined: Thu Feb 03, 2022 7:35 am

Re: Understanding the Variable Fidelity Playback in eValid

Postby eValid » Fri Feb 04, 2022 8:55 am

JCorrey wrote:Morning.

What is Variable Fidelity Playback in eValid LoadTest Mode?

Please explain what this does.

Thanks


Thanks for asking about this JCorrey.

eValid allows the user to produce test scripts that play back in 100% fidelity -- with all user actions reproduced identically to how they were recorded.

eValid also provides various ways to "de-rate" this 100% real view for purposes of adjusting the imposed load that the website server sees.

eValid scripts can be set to produce varying fidelity scripts by two different types of modifications to the original script:

(1) By adding the "Serve" command in the load test (*.evl)script or a single functional (*.evs) script file to produce a special effect on the script.

Depending on the type specified, the user can use the "Serve FULL" and "Serve TEXT" command to choose how the subsequent playbacks are handled.

(2) Using the "LoadType" command which allows the user to utilize a FULL or THIN version of the eValid playback engine.

This selection controls which eValid playback engine is used:

the full eValid engine, or the small footprint eValid THIN version.

Below is a chart which contains the possible combinations for use in a load script.

+------------+-----------------------------------------------+
| | LoadType FULL | LoadType THIN | LoadType LITE |
+------------+-----------------------------------------------+
| Serve FULL | X | X | n/a |
| Serve TEXT | X | X | n/a |
+------------+-----------------------------------------------+

Note: The "Serve URL" command can only be added to evs scripts and is ignored during a load test since it only processes URLs.

For complete information on how to create load test scripts with varying fidelity and load types, please see the following page, which also includes a complete example.

http://e-valid.com/Products/Documentati ... elity.html


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