HP-UX Virtual Partitions Administrator's Guide (includes A.05.02)

CPU, Memory, and I/O Resources (A.04.xx)
CPU: Adding and Deleting by Total
Chapter 7
261
CPU: Adding and Deleting by Total
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.
When the virtual partition is active, CPUs that were added using the cpu::num syntax can be
deleted only by using either:
• cpu:: num syntax (deletion by total), or
• cpu: hw_path syntax (deletion by hardware path)
• Deletion by total (cpu:: num ) is recommended over deletion by hardware path
(cpu: hw_path ).
Total increases 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 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: