To be more flexible with the URLs or to bypass caching mechanisms (e.g. of a web-, application- or proxy-server in your test setup), Webserver Stress Tool offers the possibility to merge additional dynamic data into the requested URLs.

Unique numbers in URL(s): Use this feature to have a unique number in the URL of each request (e.g. “cachebuster=@@” to bypass caching mechanisms).
Simply place the placeholder "@@" in the URL string(s) and it will be replaced with a number. The numbers are ascending and unique for all users and clicks.
Replace placeholders with data from file: Use this feature to place data from text files into URLs, POST-Data, Username or password. This can be used to simulate transactions or to bypass caching mechanisms.
Choose between one file for all placeholders of all URLs (i.e. "data.dat" in the directory of the EXE-file) or a file for each URL (i.e. "data1.dat" for URL1, "data2.dat" for URL2 etc.).
You can edit the files by clicking Edit "data.dat" and Edit "datax.dat" respectively.
If you need to edit the files manually, please keep in mind the following. Files must be comma delimited text files. The placeholders are "@1@" for column 1 of the current comma delimited line, "@2@" for column 2 etc. For each user one line is read from the data files. If the end of a data file is reached, the file is reread from the beginning.
Note: if there are spaces in a column please use quotation marks around the data and double quotation marks for a single quotation mark, e.g.
1,"one and two",3,4,"four and five","This "" is a quotation mark"
Webserver Stress Tool is a powerful HTTP-client/server test application designed to pinpoint critical performance issues in your web site or web server that may prevent optimal experience for your site's visitors.
Welcome
Introduction: Testing Basics
Performance, Load or Stress Testing?
Calculation of Load and Load Pattern
Webserver Stress Tool Features
How much load can Webserver Stress Tool generate?
Installation
Configuring Webserver Stress Tool
Selecting the Test Type and the Number of Users
Selecting the URLs or Editing the URL Script
Using Custom URL Scripts for Advanced URL Sequences
Performance Tips&Tricks
Running the Test
Reviewing Logfile Results
Analyzing Graphical Results
Graph Click Times & Errors (per URL)
Graph Click Times, Hits/s and Clicks/s
Graph Server and User Bandwidth
Creating Reports
Additional Features
Appendix
Software License and Contact Information