Data backup

Configure Serverov (2019-03-03)

  

Backup, storage and recovery of data


Overview


All enterprises can be divided into two categories - those where they do not back up data and those where they do.


Data backup involves the use of specialized software and related equipment. The specific implementation depends on the nature of the data, its size and location, the required copy and restore speed, and many other requirements.


Local and territorial backup systems



Backup systems can be both local and geographically distributed — for example, when branch data is copied to a central office or to other branches.


The use of various deduplication and data compression mechanisms and the concept of hierarchical storage reduces the cost of owning a data backup system сервер through more efficient use of equipment.


The process of backing up information (backup) allows you to save copies of files and directories that are on local disks to removable media, magnetic tapes, or disk or flash drives.


Redundant copies can then be used to securely store data, as well as to restore files and directories, if, as a result of a failure or other problems, they were damaged or lost.


Most often, in any modern enterprise of any size, the backup system is configured for daily mode. On backup media, the latest backup process, available for restoration to disk, when it is needed, in its original form, is in the process of backup.


Types of backup systems



Backup systems are of different types and can operate on the basis of various types of algorithms and technologies.


Archiving



One of these types of backups, for example, is archiving information купить, which results in a certain “cast” of all files and directories in the same form as they are on the primary media (usually a hard disk) at the time of archiving.


This image of the "cast" is then stored on removable media. After a complete rewriting of data to removable media, they can be removed from the hard disk, and the place on it will be freed.