Method and system for backup copying

摘要

The invention relates to restoring a backup copy in a distributed telecommunication system comprising at least two computer units, each comprising means for generating a backup copy of the computer unit; a backup unit comprising means for storing a backup copy, and a communication system connecting the computer units to the backup unit. The backup copies of the computer units are saved to the backup unit and the backup copy is restored to the computer unit when necessary. Identification data identifying the computer unit is saved to the backup unit in conjunction with the backup copy. When a backup copy is to be restored, the backup copy is directed to a computer unit on the basis of the identification data. The invention makes it possible to automate the restoration of a backup copy of a distributed data system.