Open Cluster Framework
Open Cluster Framework (OCF) is a set of standards for computer clustering.

The project started as a working group of the Free Standards Group, now part of the Linux Foundation. Original supporters included several computing companies and groups, including  Compaq, Conectiva, IBM, Linux-HA, MSC Software, the Open Source Development Lab, OSCAR, Red Hat,  SGI and SUSE.

OCF Resource agents are currently supported by Linux-HA Heartbeat, the high-availability cluster software.

References

External links 
OCF website (dead link)

Cluster computing
Free system software
High-availability cluster computing