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

It can be used to stress HTTP, WebDAV, SOAP, PostgreSQL, MySQL, LDAP and Jabber/XMPP servers. Tsung (formerly known as IDX-Tsunami) is a free software released under the GPLv2 license.

The purpose of Tsung is to simulate users in order to test the scalability and performance of IP based client/server applications. You can use it to do load and stress testing of your servers. Many protocols have been implemented and tested, and it can be easily extended. WebDAV, LDAP and MySQL support have been added recently (experimental).

It can be distributed on several client machines and is able to simulate hundreds of thousands of virtual users concurrently (or even millions if you have enough hardware ...).

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

Tsung is supported by Process-One

News

Sep 16 2008 Tsung 1.3.0 is available ! WebDAV, LDAP and MySQL support added, many bugfixes and other enhancements
Mar 4 2008 Tsung 1.2.2 is available !
Mar 25 2007 A tutorial: Writing a Tsung plugin has been contributed by tty
Nov 16 2006 Tsung 1.2.1 is available !
Sep 5 2006 pgFouine now supports Tsung and helps you to generate load sessions for PostgreSQL testing.

Main features

High Performance: the load can be distributed on a cluster of client machines
Multi-protocols using a plugin system: HTTP, WebDAV, SOAP, PostgreSQL, MySQL, LDAP and XMPP/Jabber are currently supported. SSL is also supported.
Several IP addresses can be used on a single machine using the underlying OS IP Aliasing
OS monitoring (CPU, memory and network traffic) using SNMP or Erlang agents on remote servers.
XML configuration system; several sessions can be used to simulate different type of users. Dynamic sessions can be easily described in XML (this can be used to retrieve at runtime an ID from the server output and use it later in the session).
In order to generate a realistic traffic, user think-times and the arrival rate can be randomize using a probability distribution
HTML reports can be generated during the load to view response times measurement, server CPU, etc.

HTTP

HTTP/1.0 and HTTP/1.1 support
GET and POST requests
Cookies are automatically handled
'GET If-modified since' type of request
WWW-authentication Basic
Proxy mode to record sessions using a Web browser.
Basic support for SOAP using the HTTP mode (the SOAPAction HTTP header is handle).
WebDAV extensions

XMPP (Jabber)

Authentication, presence and register messages
Chat messages to online or offline users
Roster set and get requests
Global users' synchronization can be set on specific actions

PostgreSQL

Authentication (password or MD5)
Basic Queries

MySQL

This plugin is experimental. It works only with MySQL version 4.1 and higher.

Secured authentication method only (MySQL >= 4.1)
Basic Queries

LDAP

This plugin is experimental

Bind
Add, search, modify queries
starttls (only with R12B-0 Erlang and up)