Use the backup group command to create and back up a group containing a list of files from one or more file space origins to a virtual file space on the Tivoli® Storage Manager server.
AIX® only: You
can enable snapshot-based group backup by using the option snapshotproviderfs=JFS2.
A group backup allows you to create a consistent point-in-time backup of a group of files that is managed as a single logical entity. Objects in the group are subject to the following processing rules:
- Management class rebinding for grouped
objects:
- During full backups, all objects in a backup group are assigned to the same management class.
- During differential backups, if a new management class is specified
on an include statement for an existing backup group, the following
behavior occurs:
- Any new and changed objects in the backup group are bound to the new management class.
- Any member objects of the group that are not changed appear as though they have not been bound to the new management class. These unchanged objects are not included in the Total number of objects rebound statistics that are displayed when the Backup Group command completes.
- The unchanged objects are reassigned to a newly created backup
group, and the new backup group is bound to the new management class.
However, the original management class name is still displayed for
the unchanged group objects.
Even though the original management class name is still displayed for the unchanged objects, they are effectively bound to the new management class of the backup group.
- Existing exclude statements for any files in the group are ignored.
- All objects in the group are exported together.
- All objects in the group are expired together as specified in the management class. No objects in a group are expired until all other objects in the group are expired, even when another group they belong to gets expired.
- If you are performing full and differential group backups to a sequential device, during a restore the data is in no more than two locations. To optimize restore time, perform periodic full backups to back up the data to one location on the sequential media.
- During a full group backup, all objects in the filelist are sent to the server. During a differential group backup, only data that has changed since the last full backup is sent to the server. Objects in the filelist that have not changed since the last full backups are assigned as members of the differential group backup. This data is not resent to the server, reducing backup time.
The backup group command requires the
following options:
- filelist
- Specifies a list of files to add to a new group.
- groupname
- Specifies the fully qualified name of the group containing a list of files.
- virtualfsname
- Specifies the name of the virtual file space for the group on which you want to perform the operation. The virtualfsname option cannot be the same as an existing file space name.
- mode
- Specifies whether you want to back up all of the files in the filelist or only files that have changed since the last full backup.
Note:
- If any file in the group backup fails, the entire group backup fails.
- Use the query group command to query members of a group backup on the Tivoli Storage Manager server.
- Use the restore group command to restore specific members or all members of a group backup on the Tivoli Storage Manager server.
- Unless you are running Mac OS X, use the delete group command to delete a specific group backup from the Tivoli Storage Manager server.
- Use the query filespace command to display virtual file space names for your node that are stored on the Tivoli Storage Manager server.
- A group backup can be added to a backup set.
Supported Clients
This command
is valid for all UNIX and Linux clients except Mac OS X.
This command is valid for all Windows clients.
Parameters
| Option | Where to use |
|---|---|
| filelist | Command line only. |
| groupname | Command line only. |
| mode | Command line only. |
| snapshotproviderfs |
System-options file
(dsm.sys) within a server stanza or with the include.fs option. |
| snapshotproviderfs |
Client options file (dsm.opt)
or with the include.fs option. |
| snapshotproviderimage |
Client options file
(dsm.opt) or with include.image option. |
| virtualfsname | Command line only. |
Examples
Task- Perform a full backup of all the files in the /home/dir1/filelist1 file
to the virtual file space name accounting containing
the group leader /home/group1 file. Command:
backup group -filelist=/home/dir1/filelist1 -groupname=group1 -virtualfsname=/virtfs -mode=full - Task
- Perform a full backup of all the files in the c:\dir1\filelist1 file
to the virtual file space name \virtfs containing
the group leader group1 file. Command:
backup group -filelist=c:\dir1\filelist1 -groupname=group1 -virtualfsname=\virtfs -mode=full