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Load Generation Tools

There are nearly as many load generation tools as monitoring tools. Again, this list just skims the surface. The problem with load testing tools is tools that record GUI actions like clicks are easy to use to create scripts, but hard to scale because you need as many GUI’s as virtual clients. Tools that are not GUI-based, like my own sprocket (see Chapter 4), have problems, such as they have a hard time recording SSL and dealing with cases where URL rewriting is used to store state information, but they are much more scalable.

CapCal (http://www.capcal.com/)

Load testing over the Internet. Stands for Capacity Calibration.

EJB Test (http://www.ejbtest.com/)

EJB Test is a web-based system that queries your EJB’s for their methods and exercises them, drawing graphs of their response time. It is not actually a web performance tool. It is very expensive, with prices starting at $30,000, but does a good job in a difficult situation. EJB’s are hard to test because the client piece is usually a proprietary Java GUI using a protocol specific to that application.


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