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:
- 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 backup 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.
Syntax
>>-Backup GRoup-- --options------------------------------------><
Parameters
Table 1. Backup
Group command: Related optionsOption |
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