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Some systems run once a day, usually at night while computers aren't in use. Other newer cloud backup services run continuously to capture changes to user systems nearly in real-time. The online backup system typically collects, compresses, encrypts, and transfers the data to the remote backup service provider's servers or off-site hardware.
The Advanced Maryland Automatic Network Disk Archiver (Amanda) is an open source computer archiving tool that is able to back up data residing on multiple computers on a network. It uses a client–server model , where the server contacts each client to perform a backup at a scheduled time.
Traditional backups only restore data from the time the backup was made. True continuous data protection, in contrast to "snapshots", has no backup schedules. [5] When data is written to disk, it is also asynchronously written to a second location, either another computer over the network [6] or an appliance. [7]
Add-on database and application modules provide backup services for products such as Oracle, DB2, SAP, Lotus, Informix, and Sybase, as well as Microsoft Exchange Server, SharePoint, and SQL Server. Client backup data can be sent to a remote NetWorker storage node or stored on a locally attached device by the use of a dedicated storage node.
Backup site. a place where business can continue after a data loss event. Such a site may have ready access to the backups or possibly even a continuously updated mirror. Backup software. computer software applications that are used for performing the backing up of data, i.e., the systematic generation of backup copies. See also: List of backup ...
A reverse incremental backup method starts with a non-image full backup. After the full backup is performed, the system periodically synchronizes the full backup with the live copy, while storing the data necessary to reconstruct older versions. This can either be done using hard links—as Apple Time Machine does, or using binary diffs.
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