You need at least two servers that run Linux. Currently, Pacemaker is able to SUPPORT up to 16 servers, but some people run it on clusters that have hundreds of servers, which are called nodes in the cluster. Virtually all Linux distributions are SUPPORTED. But if you need Enterprise support, Novell's SUSE Linux Enterprise Server is currently the only Linux distribution that has that ability. The servers MUST be installed in the same LAN and, in most cases, a storage area network (SAN) is required as well. For optimal performance, you need a special device that is capable of SHUTTING down a server if needed -- the STONITH device.

You need at least two servers that run Linux. Currently, Pacemaker is able to support up to 16 servers, but some people run it on clusters that have hundreds of servers, which are called nodes in the cluster. Virtually all Linux distributions are supported. But if you need Enterprise support, Novell's SUSE Linux Enterprise Server is currently the only Linux distribution that has that ability. The servers must be installed in the same LAN and, in most cases, a storage area network (SAN) is required as well. For optimal performance, you need a special device that is capable of shutting down a server if needed -- the STONITH device.