The Corosync Cluster Engine is an open source implementation of the Totem Single Ring Ordering and Membership protocol.

The mission of the Corosync effort is to develop, release, and support a community-defined, open source cluster.

The Corosync Cluster Engine is a group communication system with additional features for implementing high availability within applications.

The project provides four C API features: The software is designed to operate on UDP/IP and InfiniBand networks.

The software is composed of an executive binary which uses a client-server communication model between libraries and service engines.