View our 2010 Community Derived Roadmap

View our Corosync datasheet which briefly describes the advantages and features of Corosync.

The Corosync Cluster Engine is a Group Communication System with additional features for implementing high availability within applications. The project provides four C Application Programming Interface features:

• A closed process group communication model with virtual synchrony guarantees for creating replicated state machines.
• A simple availability manager that restarts the application process when it has failed.
• A configuration and statistics in-memory database that provide the ability to set, retrieve, and receive change notifications of information.
• A quorum system that notifies applications when quorum is achieved or lost.

Our project is used as a High Availability framework by projects such as Apache Qpid and Pacemaker.

We are always looking for developers or users interested in clustering or participating in our project.

The project is hosted by Fedora Hosted and the The Linux Foundation.

Branch	Version	Description
flatiron	1.2.7	Current stable release of the Corosync Cluster Engine.

Our project relies on a good mix of talented fresh engineering experience coupled experienced engineers to make great quality software. We validate our software using a test suite which runs on each commit of the tree. We then analyze the coverage of our test suite using lcov to produce code coverage results to help identify components in need of more test coverage.

Our full coverage reports are available online.

Our automated build and test infrastructure is provided by buildbot, Pacemaker's CTS, and our own Corosync specific CTS test cases.

• (Jul 27, 2010) Corosync 1.2.7 stable released.
• (Jun 30, 2010) Corosync 1.2.6 stable released.
• (Jun 21, 2010) Corosync 1.2.5 stable released.
• (Jun 9, 2010) Corosync 1.2.4 stable released.
• (May 19, 2010) Corosync 1.2.3 stable released.
• (May 12, 2010) Corosync 1.2.2 stable released.
• (Mar 23, 2010) Corosync 1.2.1 stable released.
• (Dec 9, 2009) Corosync 1.2.0 stable released with new statistics infrastructure and simple availability manager (SAM).
• (Oct 22, 2009) Coroysnc 1.1.2 stable released.
• (Oct 20, 2009) Corosync 1.1.1 stable released.
• (Sep 25, 2009) Corosync 1.1.0 stable released.
• (Sep 22, 2009) Corosync 1.0.1 stable released.
• (Jul 8, 2009) Corosync 1.0.0 (flatiron) stable released!!!
• (Jul 1, 2009) Corosync 1.0.0.rc1 release candidate released.
• (Jun 29, 2009) Coroynsc 0.99 development released.
• (Jun 19, 2009) Corosync 0.98 development released.
• (May 5, 2009) Corosync 0.97 development released.
• (Apr 25, 2009) Corosync 0.96 development released.
• (Mar 23, 2009) Corosync 0.95 development released.
• (Mar 2, 2009) Corosync 0.94 development released.
• (Feb 17, 2009) Corosync 0.93 development released.
• (Oct 7, 2008) Corosync 0.92 development released.
• (Aug 19, 2008) Coroysnc 0.91 development released.
• (July 24, 2008) Corosync 0.90 and OpenAIS 0.90 released with a fully split tree!