Mirrored Server
The term mirrored server refers to a technology used for data protection. Two or more servers are configured using special software to copy each other in near real time. If one of the mirrored servers fails, the data is protected by and still available on the server which did not fail. Mirroring is an effective but expensive method to protect application and business continuity. Whenever mirroring is used, backup should also be used because sometimes corruption can be mirrored from the primary server to the mirrored server. The popular social bookmark site Magnolia failed under that scenario and was unable to recover.
