FreeHA is a user-friendly and portable software that facilitates nodes' operation in high-availability clusters at zero cost.
With FreeHA, you can run any service or program that you would traditionally run on a UNIX box. If a service fails on the initial node, one of the standby servers will automatically start the service(s) running on itself. This is known as a "Highly Available" cluster configuration.
One of the best things about FreeHA is that it only requires two or more computers that can compile the software and multiple network interfaces shared between them. Ideally, these would be private interfaces. You can also use some kind of service or services that you want to ensure are running as close to "always" as possible.
At the moment, you will need some basic shell scripting knowledge to start up your own services until there are enough contributors of template scripts to cover different areas. These areas include Oracle, Mysql, PostGres, Jrun, other "application servers", LDAP services, and outbound mail gateways (smtp.yourcompany.com).
In conclusion, FreeHA is an excellent program that can help you run services without the fear of any failure. It's easy to use, portable, and free, making it a must-have for anyone looking for a highly available cluster solution.
Version 1.0: N/A