DYNAPOOL command allows an operator to
assign a value to a UCB address. ACC can then access the assigned value with
the use of the DYNAPOOL symbolic field. This facility allows device pools to be
dynamically changed by the operator. For example, the operator could use the
DYNAPOOL command to reserve tape drive(s) for backup jobs. After the jobs
complete, the drive(s) could then be released for general usage. DYNAPOOL command with
only the UCB address specified. The LIST operand can be used to display the currently reserved UCBs
and the associated dynamic pool names. When the list form of the command is used, both the
ucbmask and datamask can use wildcard characters: the
asterisk (*) and question mark (?). These characters enable
rules processing to perform pattern matching.
- The asterisk (
*) stands for any sequence of characters. - The question mark (
?) stands for any single character in the position.
Syntax:
DYNAPOOL {ucb} [data]
DYNAPOOL {ucbmask} {datamask} {LIST}
Comments: Since the DYNAPOOL symbolic name can only be
eight bytes long, the data portion of the DYNAPOOL command
is limited to eight characters.
The DYNAPOOL command reserves devices for use by specific
ACC pool definitions. The devices will not be available to
non-ACC controlled device requests, or pool definitions that do not
contain the appropriate DYNAPOOL request.
DYNAPOOL is used to reserve or
release a device, a REFRESH command will automatically be performed to
rebuild the ACC device pool definitions.
Examples: The following console command would reserve the tape drive at
unit address 590 for pool definitions that contain
DYNAPOOL=BACKUP.
F DIF,DYNAPOOL 590 BACKUP