Acronis Backup & Recovery 10 Advanced Workstation TIDLBPDES5 Manual De Usuario
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For example, if a managed vault where deduplication is enabled contains two copies of the same
file—whether in the same archive or in different archives—the file is stored only once, and a link to
that file is stored instead of the second file.
file—whether in the same archive or in different archives—the file is stored only once, and a link to
that file is stored instead of the second file.
Deduplication may also reduce network load: if, during a backup, a file or a disk block is found to be a
duplicate of an already stored one, its content is not transferred over the network.
duplicate of an already stored one, its content is not transferred over the network.
Deduplication is performed on disk blocks (block-level deduplication) and on files (file-level
deduplication), for disk-level and file-level backups respectively.
deduplication), for disk-level and file-level backups respectively.
In Acronis Backup & Recovery 10, deduplication consists of two steps:
Deduplication at source
Performed on a managed machine during backup. Acronis Backup & Recovery 10 Agent uses the
storage node to determine what data can be deduplicated, and does not transfer the data whose
duplicates are already present in the vault.
storage node to determine what data can be deduplicated, and does not transfer the data whose
duplicates are already present in the vault.
Deduplication at target
Performed in the vault after a backup is completed. The storage node analyses the vault's
archives and deduplicates data in the vault.
archives and deduplicates data in the vault.
When creating a backup plan, you have the option to turn off deduplication at source for that plan.
This may lead to faster backups but a greater load on the network and storage node.
This may lead to faster backups but a greater load on the network and storage node.
Deduplicating vault
A managed centralized vault where deduplication is enabled is called a deduplicating vault. When you
create a managed centralized vault, you can specify whether to enable deduplication in it. A
deduplicating vault cannot be created on a tape device.
create a managed centralized vault, you can specify whether to enable deduplication in it. A
deduplicating vault cannot be created on a tape device.
Deduplication database
Acronis Backup & Recovery 10 Storage Node managing a deduplicating vault, maintains the
deduplication database, which contains the hash values of all items stored in the vault—except for
those that cannot be deduplicated, such as encrypted files.
deduplication database, which contains the hash values of all items stored in the vault—except for
those that cannot be deduplicated, such as encrypted files.
The deduplication database is stored in the folder which is specified by the Database path in the
Create centralized vault view when creating the vault. Deduplication database can be created in a
local folder only.
Create centralized vault view when creating the vault. Deduplication database can be created in a
local folder only.
The size of the deduplication database is about one percent of the total size of archives in the vault.
In other words, each terabyte of new (non-duplicate) data adds about 10 GB to the database.
In other words, each terabyte of new (non-duplicate) data adds about 10 GB to the database.
In case the database is corrupted or the storage node is lost, while the vault retains archives and the
service folder containing metadata, the new storage node rescans the vault and re-creates the
database.
service folder containing metadata, the new storage node rescans the vault and re-creates the
database.
2.11.6.2. When deduplication is most effective
The following are cases when deduplication produces the maximum effect:
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