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What is LoadRunner?

What is LoadRunner?..

Answer /


LoadRunner works by creating virtual users who take the
place of real users operating client software, such as
sending requests using the HTTP protocol to IIS or Apache
web servers. Requests from many virtual user clients are
generated by Load Generators in order to create a load on
various servers under test these load generator agents are
started and stopped by Mercury's Controller program. The
Controller controls load test runs based on Scenarios
invoking compiled Scripts and associated Run-time Settings.
Scripts are crafted using Mercury's "Virtual user script
Generator" (named "V U Gen"), It generates C-language
script code to be executed by virtual users by capturing
network traffic between Internet application clients and
servers. With Java clients, VuGen captures calls by hooking
within the client JVM. During runs, the status of each
machine is monitored by the Controller. At the end of each
run, the Controller combines its monitoring logs with logs
obtained from load generators, and makes them available to
the "Analysis" program, which can then create run result
reports and graphs for Microsoft Word, Crystal Reports, or
an HTML webpage browser.
Each HTML report page generated by Analysis includes a link
to results in a text file which Microsoft Excel can open to
perform additional analysis. Errors during each run are
stored in a database file which can be read by Microsoft

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