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7.2.3
Parameters set through Windows registry
The following are the parameters of Acronis Backup & Recovery 10 Storage Node that can be set only
by editing the registry.
Parameter related to deduplication
CompactingTriggerThreshold
Description:
Specifies the percentage of used items in the data stores below which compacting
occurs.
Possible values:
Any integer number between
0
and
100
Default value:
80
Registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Acronis\ASN\Configuration\StorageNode\CompactingTrigge
rThreshold
As backups are deleted from a deduplicating vault, its deduplication data stores (p. 64) may
contain unused items: files or disk blocks that are no longer referred to from any backup. The
storage node processes both data stores in turn to delete the unused items. This operation is
called compacting.
Since compacting is a resource-consuming operation, it should occur only when the number of
unused items is significant.
The
CompactingTriggerThreshold
parameter
enables you to set up a balance between the extra
space required to store unused items and the compacting frequency. The larger the value of this
parameter, the fewer unused items are allowed in the data stores, but compacting will likely be
more frequent.
This parameter applies separately to disk-level and file-level backups. So, compacting may be
performed for one data store and skipped for the other.
Parameters related to vault databases
The following two parameters determine paths to Acronis Backup & Recovery 10 Storage Node's
internal databases, which contain information about managed vaults.
The database that is located in the folder specified by the
DatabasePath
parameter is typically small.
However, the database that is located in the folder specified by the
TapeDatabasePath
parameter
(called the tape database), may be large if the tape library contains thousands of archives. In this
case, you may want to store the tape database on a different volume.
Important: We do not recommend modifying these parameters. If you do need to modify either of them, you
should do this before creating any corresponding (tape or non-tape) managed vaults. Otherwise, the storage
node will lose access to those vaults until you re-attach them, and re-attaching a vault—especially a
deduplicating one—may take a considerable amount of time.
DatabasePath
Description:
Specifies the folder where Acronis Backup & Recovery 10 Storage Node stores its
non-tape vaults database.
This database contains a list of vaults that are managed by the storage node, other than tape
vaults (see the next parameter). Its typical size does not exceed a few kilobytes.
Possible values:
Any string 0 to 32765 characters long
Default value:
C:\Program Files\Acronis\StorageNode
