Clustering Servers-
“erver clustering reduces the number of backup or standby servers needed by a system, improves availability, and uses hardware more efficiently. Traditionally, data centers required one backup server for each primary working server. That no longer is necessary. N+1 server clustering technology allows for only one backup server per cluster of servers. For example, instead of needing six passive servers to back up six active servers, with N+1 clustering you need only one passive server. “
