Backup

It is the copy in a computer data file to be able to restore the original after a data loss event. Backup copies serve two purposes. The loss of data can be a common experience of computer users. The secondary purpose of the backups is to recover the data from a previous moment, in accordance with a policy of retention of user redirection data, normally configured in a time backup application to print the data. Safety copies represent a simple form of disaster recovery and parts of any disaster recovery plan. One of the reasons for this is that not all backup systems can reconstitute a computer system or other complex configuration, such as a group of computers, an active directory server or a database server simply by restoring the data from a copy of security Since a backup system contains less a copy of all the data that looks worthy of guard, the data storage requirements can be important. Organizing this storage space and managing the backup process can be a complicated task. A data repository model can be used to provide the storage structure. There are also many different ways in which these devices can be organized to provide geographic redundancy, data security and portability. Before the data is sent to its storage contents, it is selected, extracted and manipulated. Many different techniques have been developed to optimize the backup procedure. These include optimizations to deal with open files and live data sources, as well as compression, encryption and deduplication, among others. Each backup scheme must include dry runs that validate the reliability of the data they support. It is important to recognize the limitations and human factors involved in any backup scheme.

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