HP-UX Virtual Partitions Administrator's Guide (includes A.04.06 and A.05.04)

NOTE: CPU deletion fails when deletion by total and by CLP are given in the same vparmodify
command.
In this situation, the CPU deletion by total fails with the error message “vPar does not own
enough Monitor-assigned CPUs to satisfy the request” although there are enough
monitor-assigned CPUs.
Instead, issue separate vparmodify commands to delete by total and delete by CLP.
For example instead of issuing the following command:
# vparmodify -p vpar1 -d cell:3:cpu::2 -d cpu::1
Issue two separate commands to delete by CLP and then by total:
# vparmodify -p vpar1 -d cell:3:cpu::2
# vparmodify -p vpar1 -d cpu::1
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:
CPU: Adding and Deleting by Total 233