Load Testing

CLIF
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CLIF provides a flexible, extensible Java-based platform for scalable, distributed load injection and performance testing. With the Eclipse-based GUI, use provided or custom load injectors and probes, and run up to millions of vUsers per injector!

Opensta
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OpenSTA is a distributed software testing architecture designed around CORBA, it was originally developed to be commercial software by CYRANO. The current toolset has the capability of performing scripted HTTP and HTTPS heavy load tests with performance measurements from Win32 platforms.

jMeter
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Apache JMeter may be used to test performance both on static and dynamic resources (files, Servlets, Perl scripts, Java Objects, Data Bases and Queries, FTP Servers and more). It can be used to simulate a heavy load on a server, network or object to test its strength or to analyze overall performance under different load types. You can use it to make a graphical analysis of performance or to test your server/script/object behavior under heavy concurrent load.

Tsung
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Tsung is an open-source multi-protocol distributed load testing tool

It can be used to stress HTTP, SOAP, PostgreSQL and Jabber/XMPP servers. Tsung (formerly known as IDX-Tsunami) is a free software released under the GPL license.

The purpose of Tsung is to simulate users in order to test the scalability and performances of IP based client/server applications. You can use it to do load and stress testing of your servers. Currently, HTTP, PostgreSQL and XMPP(Jabber) protocols have been implemented and tested, but it can be easily extended.

It can be distributed on several client machines and is able to simulate thousands of virtual users concurrently.

Tsung is developped in Erlang, an open-source language made by Ericsson for building robust fault-tolerant distributed applications.

Grinder
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The Grinder is a JavaTM load-testing framework. It is freely available under a BSD-style open-source license.

The Grinder makes it easy to orchestrate the activities of a test script in many processes across many machines, using a graphical console application. Test scripts make use of client code embodied in Java plug-ins. Most users of The Grinder do not write plug-ins themselves, instead they use one of the supplied plug-ins. The Grinder comes with a mature plug-in for testing HTTP services, as well as a tool which allows HTTP scripts to be automatically recorded.

The next major version of The Grinder, The Grinder 3 is currently available as a beta quality release. The Grinder 3 uses the powerful scripting language Jython, and allows any Java code to be tested without the need to write a plug-in. New users are advised to start with The Grinder 3.

The Grinder was originally developed for the book Professional Java 2 Enterprise Edition with BEA WebLogic Server by Paco Gómez and Peter Zadrozny. Philip Aston took ownership of the code and reworked it to create The Grinder 2. Philip continues to enhance and maintain The Grinder, and welcomes all contributions. Peter, Philip and Ted Osborne published the book J2EE Performance Testing which makes extensive use of The Grinder.

WebLOAD Open Source
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WebLOAD provides a comprehensive and robust environment for load testing. This includes a full authoring environment for recording, editing and debugging test scripts, a highly efficient execution environment for defining load parameters (virtual users), running and monitoring the tests as well as reporting tools for analyzing and presenting test results.

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