HP-UX Virtual Partitions Administrator Guide (includes A.05.07) (5900-1229, September 2010)

different meanings depending upon the vPars version, the type of server, and the user
intent. For example, the path of x/y can mean any of the following:
— sba=x, lba=y on a non-nPartitionable server running vPars A.03.01 or earlier
— sba=x, lba=y on a non-nPartitionable server running vPars A.03.02 or later or A.04.xx
— cell=x, sba=y on an nPartitionable server running vPars A.03.02 or later or A.04.xx
• Supported I/O Check your hardware manual to verify that your mass storage unit can be
used as a bootable device. If a mass storage unit cannot be used as a boot disk on a non-vPars
server, it cannot be used as a boot disk on a vPars server. vPars does not add any additional
capability to the hardware.
For information on supported I/O interface cards and configurations, see the document
HP-UX Virtual Partitions Ordering and Configuration Guide.
Memory: Concepts and Functionality
Acronyms
ILM Interleaved Memory.
• The nPartition’s system default is to have all memory configured as ILM.
• vPars A.03.xx and A.02.xx use and assign only ILM; vPars A.04.xx allows use of ILM
and CLM.
CLM Cell Local Memory.
• Using nPartition commands, you can re-configure a portion of a cell’s memory as
CLM. Beginning with vPars A.04.01, you can assign an amount of available CLM to
a virtual partition.
• This capability should be used only if you are an advanced administrator. Further,
CLM is meant to be used in conjunction with CLP (cell local processor); not doing so
may actually cause performance degradation.
Assignments
You assign memory to a virtual partition:
• by size
this uses the nPartition’s ILM.
• by cell and a corresponding size
this uses the specified cell’s CLM.
Within the available nPartition’s ILM or cell’s CLM, you can also:
• specify an address range to use
This does not increase the amount of memory assigned to the virtual partition. The address
range is a specific subset of the existing ILM or CLM amount assigned to the virtual partition.
Therefore, the total amount of memory specified by ILM or CLM addresses cannot exceed
the amount of ILM and CLM assigned to the virtual partition.
NOTE: The virtual partition must be in the down state to add or delete memory resources.
Granularity
Granularity refers to the unit size in which memory is assigned to the all virtual partitions in a
given vPars database (vpdb). You should be careful when using the granularity option; using
the granularity option incorrectly can cause all the virtual partitions to not be bootable. For
information, see “Memory: Granularity Concepts” (page 226).
222 CPU, Memory, and I/O Resources (A.04.xx)