Installing and Managing HP-UX Virtual Partitions (includes A.04.01)

CPU, Memory, and IO Resources
CPU: Adding and Deleting by Total (vPars A.04)
Chapter 6
177
CPU: Adding and Deleting by Total
(vPars A.04)
The basic syntax for adding and deleting CPUs is
-a|d|m cpu::num
where
a|d|m specifies adding, deleting, or modifying the total count of CPUs
num specifies the number of CPUs
NOTE The virtual partition can be either up or down when using the cpu::num syntax.
CPUs that are added using the cpu::num syntax can be deleted only by using either the
• cpu::num syntax or
• cpu:hw_path syntax (deletion by hardware path)
Total increase or decreases by num when using the -a or -d options and is set to num when
using the -m option.
vparcreate
With the vparcreate command, you would use the -a option and specify as num the number of CPUs to
allocate to the virtual partition.
If no cpu syntax is given on the vparcreate command line, the default value for total is 1.
Example
• To create the virtual partition keira2 with 3 CPUs, set num to 3:
keira1# vparcreate -p keira2 -a cpu::3 ...
vparmodify
With the vparmodify command, you can either use the
• -a option to add num CPUs to the virtual partition
• -d option to delete num CPUs from the virtual partition
• -m option to modify (set) to num the number of CPUs assigned to the partition . The vPars Monitor
automatically will add or delete CPUs to or from the virtual partition to reach num CPUs
Examples
• If an existing partition has 2 CPUs and you would like to set the number of CPUs to 3, you can modify the
number of CPUs assigned to the partition by using the -m option and setting num to 3:
keira1# vparmodify -p keira2 -m cpu::3
To set the number of CPUs back to two, use the -m option and set num to 2
keira1# vparmodify -p keira2 -m cpu::2