272 Copyright © Acronis International GmbH, 2002-2015
relieve managed machines (p. 269) of unnecessary CPU load by performing cleanup (p. 264),
validation (p. 272) and other operations with backup archives (p. 261) which otherwise would be
performed by agents (p. 261)
drastically reduce backup traffic and storage space taken by the archives (p. 261) by using
deduplication (p. 265)
prevent access to the backup archives, even in case the storage medium is stolen or accessed by
a malefactor, by using encrypted vaults (p. 268).
T
Task
A set of actions to be performed by Acronis Backup at a certain time or event. The actions are
described in a non human-readable service file. The time or event (schedule) is stored in the
protected registry keys (in Windows) or on the file system (in Linux).
Tower of Hanoi
A popular backup scheme (p. 262) aimed to maintain the optimal balance between a backup archive
(p. 261) size and the number of recovery points (p. 270) available from the archive. Unlike the GFS (p.
268) scheme that has only three levels of recovery resolution (daily, weekly, monthly resolution), the
Tower of Hanoi scheme continuously reduces the time interval between recovery points as the
backup age increases. This allows for very efficient usage of the backup storage.
For more information please refer to "Tower of Hanoi backup scheme (p. 49)".
U
Unmanaged vault
Any vault (p. 272) that is not a managed vault (p. 269).
V
Validation
An operation that checks the possibility of data recovery from a backup (p. 261).
Validation of a file backup imitates recovery of all files from the backup to a dummy destination.
Validation of a disk backup calculates a checksum for every data block saved in the backup. Both
procedures are resource-intensive.
While the successful validation means a high probability of successful recovery, it does not check all
factors that influence the recovery process. If you back up the operating system, only a test recovery
under the bootable media to a spare hard drive can guarantee successful recovery in the future.
Vault
A place for storing backup archives (p. 261). A vault can be organized on a local or networked drive or
detachable media, such as an external USB drive. There are no settings for limiting a vault size or the
number of backups in a vault. You can limit the size of each archive using cleanup (p. 264), but the
total size of archives stored in the vault is limited by the storage size only.
