RSF-1: The First High Availability Middleware Solution for Enterprise Unix Systems

RSF-1 is a High Availability Cluster technology developed by Limited in Cheshire, England.

The original concept was designed and developed by Grenville Whelan and Paul Griffiths of Grenville Consulting Limited and originally deployed for National Vulcan Engineering Insurance in Manchester July 1995 on a SPARCCentre 2000 and SPARCCentre 1000 to provide High Availability support for the insurer’s EPOQ application running on INGRES 6.4 and Solaris 2.1. This first deployment continued to run without RSF-1 upgrades or patches for over 10 years.

Grenville and Paul set up RSI Solutions Limited in 1996 to take the RSF-1 product to the market. In April 2000, the company was renamed to High-Availability.Com to better reflect the company’s focus.

In the following years, RSF-1 was further developed to support N+1 High Availability configurations and ported to most flavors of Unix, including SunOS, Solaris, HP-UX, AIX and Linux, and later OSX, FreeBSD, OpenSolaris, illumos and OpenIndiana.  An agent framework was added to provide specific application and database support for many popular enterprise databases and applications. New partnerships developed with organizations seeing RSF-1 deployed in thousands of critical environments supporting a myriad of mission critical services and applications around the world.

Since 2009, RSF-1 has been widely used in Open Storage environments, notably in ZFS-based Storage Appliances, under OEM agreements with a number of Open Storage companies that are disrupting the current legacy storage market. By June 2013, RSF-1 has been deployed on over 1,300 such ZFS-based appliances.