Air Cleaner User Manual

This command does not back up files, or files within directories, that are specified
in the exclude list. See the chexcludelist command for information on creating
exclude lists.
The backup can also be performed as a “pull” backup to enable central
management of backups. The machine that “pulls” the backup is called the
“initiator,” while the machine that is backed up is called the “backup system.” The
machine that receives the backup data is called the “destination system.”
The initiator is the machine where the mkdirback command is issued. The backup
system is referenced in the command syntax by the -U “host” flag. The data
destination system is referenced by the -h “host flag”.
When only the -U “host” flag is specified, the -f “device” flag refers to a device on
the initiator system. In this case, the backup destination and the initiator are the
same system. This is known as a “two-way pull backup.”
When the -U “host” and -h “host” flags are specified, the -f “device” flag refers to
a device on the host specified by the -h “host” flag. In this case, the backup
destination and the initiator are different systems. This is known as a “three-way
pull backup.”
Remote Services must be configured, using the cfgremsvs command, on all of the
machines involved in the backup operation, the initiator, the backup system, and
the data destination machines. The backup destination machine must have the
Server Options of Remote Services configured to allow the backup system machine
to send its data to devices on the backup destination machine. You can do this
with the Add or Change Client Host Access to this Server option or the
cfgremaccess command.
The backup system machine must have the Client Options of Remote Services
configured to specify the backup destination machine as a backup host. You can do
this with the Add or Change List of Remote Backup Servers option or the
cfgremserver command.
The backup system must also configure Remote Command Access to allow the
initiator machine to pull the backup.
Flags
-b “size”
Specifies the buffer size in K-bytes (1024-bytes). This value either increases or
decreases the amount of data that is written to the output device at one time.
Some devices with small buffers might require you to reduce this value, while
other devices with very large buffers can benefit from increased performance
by increasing this value. If you are unsure, use the default value (64 Kbytes).
-c “termdev”
If the backup spans multiple tape volumes, the volume prompt is sent to the
termdev device (such as /dev/tty0). If the -h hostname option is specified, this
flag specifies the device on the remote host.
-d “description”
A custom description to be included in the backup header. If the description
includes spaces, the entire description must be enclosed in double quotation
marks (″).
A-34 IBM Tivoli Storage Manager for System Backup and Recovery: Installation and User’s Guide