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FH_RETENTION_TYPES enumeration (fhcfg.h)

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Specifies under what conditions previous versions of files and folders can be deleted from a backup target.

Syntax

typedef enum _FH_RETENTION_TYPES {
  FH_RETENTION_DISABLED = 0,
  FH_RETENTION_UNLIMITED,
  FH_RETENTION_AGE_BASED,
  MAX_RETENTION_TYPE
} FH_RETENTION_TYPES;

Constants

 
FH_RETENTION_DISABLED
Value: 0
Previous versions are never deleted from the backup target.
FH_RETENTION_UNLIMITED
The operating system can delete any previous version on an as-needed basis, unless it is the most recent version of a file that currently exists and is within the protection scope.
FH_RETENTION_AGE_BASED
The operating system can delete any previous version older than the specified minimum age on as-needed basis, unless it is the most recent version of a file that currently exists and is within the protection scope. The minimum age is specified by the FH_RETENTION_AGE local policy.
MAX_RETENTION_TYPE
The maximum enumeration value for this enumeration. This value and all values greater than it are reserved for system use.

Remarks

The operating system deletes previous versions from a backup target only when the target is full or when the user has initiated data retention manually by using the File History item in Control Panel.

If FH_RETENTION_AGE_BASED is specified and the target is large enough, it is possible for the target to contain versions that are much older than the minimum age that is specified by the FH_RETENTION_AGE local policy.

Requirements

Requirement Value
Minimum supported client Windows 8 [desktop apps only]
Minimum supported server Windows Server 2012 [desktop apps only]
Header fhcfg.h

See also

IFhConfigMgr::GetLocalPolicy

IFhConfigMgr::SetLocalPolicy