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

CPU, Memory, and IO Resources
Memory: Configuring CLM for an nPartition in Brief (vPars A.04)
Chapter 6
162
Memory: Configuring CLM for an nPartition in Brief
(vPars A.04)
You can assign only available CLM to a virtual partition. However, by nPartition system default, nPartition
cells are configured as 100% ILM and 0% CLM. However, ILM memory can be re-configured to be CLM using
the parmodify command.
For complete information on CLM and configuring cells and nPartitions, see the nPartition’s Guide.
parmodify syntax
The syntax for the parmodify command is
parmodify -p nPar_num -mcell:[type]:[use]:[fail][:clm]
where
nPar_num is the nPartition number
cell is the cell to be modified. this can be either the global format (cell_number) or
hardware format (cabinet/slot)
type is the cell type. base is the only valid value and is the default.
use is the use-on-next-boot value. this is either a y or n. The default is y. Use y if the cell is
to be an active member of the nPartition or n if the cell is to be an inactive member
fail is the cell failure usage. the only valid value is ri (reactivate with interleave) and is the
default
clm is the amount of memory that will be configured as cell local memory for the cell. this
value can either be an absolute (the default) or percentage value. The absolute value is a
number, which represents the amount of memory in gigabytes; the percentage value is
any number followed by the character %.
Example
To configure 1 GB of memory as CLM on cell 6 of nPartition 0, the command is
# parmodify -p0 -m 6::::1
For the parmodify change to take effect, you need to reboot the nPartition. This can be done by MON> reboot.
Configuring CLM Notes
• Any memory that is not configured as CLM remains ILM.
• You need to be sure to leave enough ILM memory for your virtual partitions to boot, as specified in your
vPars database. Also, on PA-RISC not all memory can be configured as CLM in an nPartition. You need to
allow ILM memory for the vPars Monitor to boot and for all the OS kernels to boot; excluding the first
granule, a portion of which is used by the Monitor, there must be at least one entire granule that exists
below the 2 GB limit for each virtual partition. These granules below the 2 GB limit are used by kernel of
each virtual partition.
• nPartition configuration rules limit the minimum amount of configured CLM memory for a cell. If you
have any CLM on a cell, it must be at least 512MB.