Process One

Tsung is a distributed load testing tool and an open source tool written in Erlang. It is protocol-independent and can currently be used to stress Jabber/XMPP, HTTP, SOAP, LDAP and PostgreSQL servers (SSL is supported). It simulates complex user's behaviour using an XML description file, reports many measurements in real time (including response times, CPU and memory usage from servers, customized transactions, etc.). HTML reports (with graphics) can be generated during the load. For HTTP, it supports 1.0 and 1.1, has a proxy mode to record sessions, supports GET and POST methods, Cookies, and Basic WWW-authentication. It has already been used to simulate thousands of virtual users.