Operation Manual

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.