Technical data

Using BACKUP
11.7 Setting Process Quotas for Efficient Backups
ASTLM 24
BIOLM 18
BYTLM 32768
ENQLM 200
2. Using the System Management utility (SYSMAN), determine the value of the
system parameters WSMAX and CHANNELCNT, as follows:
$ RUN SYS$SYSTEM:SYSMAN
SYSMAN> PARAMETERS SHOW WSMAX
%SYSMAN-I-USEACTNOD, a USE ACTIVE has been defaulted on node DIEM
Node DIEM: Parameters in use: ACTIVE
Parameter Name Current Default Minimum Maximum Unit Dynamic
-------------- ------- ------- ------- ------- ---- -------
WSMAX 2600 1024 60 100000 Pages
SYSMAN> PARAMETERS SHOW CHANNELCNT
Parameter Name Current Default Minimum Maximum Unit Dynamic
-------------- ------- ------- ------- ------- ---- -------
CHANNELCNT 127 127 21 2047 Channels
SYSMAN> EXIT
$
In this case, the values for WSMAX and CHANNELCNT, as shown in the
column marked Current, are 2600 and 127, respectively.
3. Compare the values for SYSTEM to the values in Table 11–4, and set the
appropriate values:
$ SET DEFAULT SYS$SYSTEM
$ RUN AUTHORIZE
UAF> MODIFY SYSTEM/WSQUOTA=2600
UAF> MODIFY SYSTEM/WSEXTENT=2600
UAF> MODIFY SYSTEM/DIOLM=4096
UAF> MODIFY SYSTEM/ASTLM=4096
UAF> MODIFY SYSTEM/BIOLM=40
UAF> MODIFY SYSTEM/BYTLM=34816
UAF> EXIT
4. Log out and then log in again so that these process quotas take effect.
11.8 Using Disks and Tapes
During the course of your backup operations, you will use both disk and tape
volumes. The steps you normally perform before using a volume in a backup
operation are:
1. Determine the device name.
2. Allocate the device.
3. Initialize the volume (optional).
4. Mount the device (for disks only; BACKUP mounts tapes automatically).
These tasks are described in Chapter 9. This chapter describes specifically how
these tasks relate to BACKUP. Note that all disk operations in this chapter also
apply to diskettes.
Using BACKUP 11–13