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of RAM, but leave at least 2 GB of RAM for the operating system and other applications. You can
change this behavior by using the DatastoreIndexCacheMemoryPercent and
DatastoreIndexReservedMemory parameters.
The amount of allocated memory is calculated based on the following rule:
Allocated memory = DatastoreIndexCacheMemoryPercent percents, but not more than total
available RAM minus DatastoreIndexReservedMemory
This rule ensures a balance between the storage node performance and the operating system
memory requirements, for systems with RAM ranging from 8 to 64 and more gigabytes. If the server
has plenty of RAM, the storage node takes most of the memory for better performance. If the server
lacks RAM (less than 10 GB with the default parameter values), the storage node reserves the fixed
amount of memory for the operating system.
DatastoreIndexCacheMemoryPercent
Possible values: Any integer number between 0 and 100, in percents
Registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Acronis\ASN\Configuration\StorageNode\DatastoreIndexCac
heMemoryPercent
Default value: 80%
To apply the change, restart the Acronis Storage Node Service.
DatastoreIndexReservedMemory
Possible values: 0 up to RAM size, in megabytes
Registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Acronis\ASN\Configuration\StorageNode\DatastoreIndexRes
ervedMemory
Default value: 2048 MB
To apply the change, restart the Acronis Storage Node Service.
7.5.7 Deduplication
This section describes deduplication, a mechanism designed to eliminate data repetition by storing
identical data in archives only once.
7.5.7.1 Overview
Deduplication is the process of minimizing storage space taken by the data by detecting data
repetition and storing the identical data only once.
Deduplication may also reduce network load: if, during a backup, a data is found to be a duplicate of
an already stored one, its content is not transferred over the network.
Acronis Backup will deduplicate backups saved to a managed vault if you enable deduplication during
the vault creation. A vault where deduplication is enabled is called a deduplicating vault.
