ejabberd is a high-performance instant messaging server. It scales naturally to tens of thousands of simultaneous users connected on a single ejabberd node, but it can scale even better by adding more nodes into the ejabberd cluster.

ejabberd cluster feature leads to interesting characteristics:

* A single domain can be served from a cluster of ejabberd server

* Fault-tolerance: When running on a cluster of computers, ejabberd database is redundant and keep in sync thanks to a robust distributed transactional database. If a cluster node crash the overall behaviour of the ejabberd domain is not affected and the service is still available.

* Cluster nodes can be added or removed on the fly, without stopping the servers.

Other importants ejabberd features are:

Important ejabberd features are:

* Clustering used on large scale deployments.

* Standard compliance (XMPP).

* Modular architecture.

* Virtual hosting (Virtual domains).

* Web administration console (XHTML compliant).

* Several build-in services (Publish and subscribe, IRC gateway, Multi-user chat, anonymous login, ...)

* Statistics via Statistics Gathering (JEP-0039).

* Translated in 11 languages.

* Graphical installers for Linux, MacOSX/PPC and Windows.

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