![Windows operating systems](ngwin.gif)
![Linux operating systems](nglinux.gif)
Diffsnapshot
The diffsnapshot option controls whether the backup-archive client creates the differential snapshot when it runs a snapshot difference incremental backup.
If the differential snapshot is not created by the client, the latest snapshot found on the volume is used as the differential snapshot and as the source for the backup operation.
The default value is to create the differential snapshot. This option is ignored the first time that the snapdiff option is used. The first time the snapdiff option is used on a volume, a snapshot must be created and used as the source for a full incremental backup. Snapshots that are created by the backup-archive client are deleted by the client after the next snapshot difference incremental backup is complete.
Snapshots can be created with the Network Appliance FilerView tool. Use the
latest parameter if you want the client to use the most recent snapshot that was
created with this or any other method. Snapshots that are created by methods outside of IBM
Spectrum Protect are never deleted by the client.
Snapshots can be created with the Network Appliance FilerView tool. Use the
latest parameter if you want the client to use the most recent snapshot that was
created. Whatever method is used to create named snapshots, snapshot names that differ only by case
will not work properly with the snapdiff option. Snapshots that are created by the
client will not have the casing problem. Snapshots that are created by methods outside of IBM
Spectrum Protect are never deleted by the client.
Supported Clients
This option is valid for all
Windows clients.
This option is valid for Linux x86_64 clients.
Syntax
Parameters
- create
- Specifies that you want to create a new, persistent, snapshot to use as the source snapshot. This value is the default.
- latest
- Specifies that you want to use the latest snapshot that is found on the file server as the source snapshot.
Examples
Command line:
Perform a snapshot difference incremental backup of an NFS mounted file system
/vol/vol1
hosted on the file serverhomestore.example.com
, where/net/home1
is the mount point of/vol/vol1
.Command line:
Perform a snapdiff incremental backup from a snapshot that was taken of a network share
//homestore.example.com/vol/vol1
mounted on driveH:
, wherehomestore.example.com
is a file server.