mirroring

The duplication of data for purposes of backup or to distribute Internet or network traffic among several servers with identical data. See also Disc Mirroring.

A method of data replication that maintains an exact copy of electronic records by applying changes at the secondary site in lockstep with or synchronous to changes at the primary site See also mirror image and shadowing.

Disk mirroring hardware or software, such as MirrorDisk/UX. Some mirroring methods may allow splitting and merging.

Of a network server, the maintenance of an identical copy of its files in (a) another network server, or (b) a redundant drive in the same server chassis. Note: Mirroring can be used as a rudimentary backup system for the original files, but is more often used to spread out the access load for popular sites, e.g., Web sites, by offering users several different locations from which identical files can be accessed. 2. Of a computer, the maintenance of an identical copy of its files in (a) another computer, or (b) another drive in the same computer chassis.