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 GPLv2 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.

Tsung is supported by Process-One

News

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.
May 29 2006 Tsung 1.2.0 is available !

Main features

High Performance: the load can be distributed on a cluster of client machines
Multi-protocols using a plugin system: HTTP, SOAP and 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 trafic) using SNMP or Erlang agents on remote servers.
XML configuration system; several sessions can be used to simulate differents 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 trafic, user thinktimes and the arrival rate can be randomize using a probability distribution (exponential currently)
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 automaticaly 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).

Jabber

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

PostgreSQL

Authentication (password)
Basic Queries