HP-UX Virtual Partitions Administrator's Guide - filibeto.org

Memory: Concepts and Functionality
Definitions for Assigning (Adding) Or Deleting ILM or CLM Memory
Physical memory can be divided into two categories: ILM and CLM.
ILM Interleaved Memory, where memory consists of blocks of memory from one or more cells
of the nPartition.
CLM Cell Local Memory, where memory consists of blocks of memory from only a specific cell
of the nPartition.
You can assign memory to a virtual partition by any of the following methods:
• By size.
— This uses the nPartition’s ILM. The basic syntax for this is:
-a|d mem::size
— For more information, see “Memory: Assigning (Adding) or Deleting by Size (ILM)”
(page 186).
• By cell and a corresponding size.
— This uses the specified cell’s CLM. The basic syntax for this is:
-a|d cell:cell_ID:mem::size
— For more information, see “Memory: Assigning (Adding) Or Deleting by Size (CLM)”
(page 186).
• By address range.
— This uses an address range within the available nPartition’s ILM or cell’s CLM. The
basic syntax for this is:
-a|d mem:::base:range
For more information, see “Memory: Assigning (Adding) Or Deleting by Address
Range” (page 188).
Definitions for Dynamically Migrating ILM or CLM Memory
NOTE: Dynamic memory migration may require a system firmware upgrade. See the HP-UX
Virtual Partitions Ordering and Configuration Guide for details.
When assigning (adding) or deleting either ILM or CLM to a virtual partition, you can specify
the memory as either base or float.
Base Base memory cannot be deleted from a virtual partition when a virtual partition is up.
When a virtual partition is up, base memory can only be added to a virtual partition. To
delete base memory, the target virtual partition must be down. When the target virtual
partition is down, base memory can always be added to or deleted.
To specify base memory, you can append :base or :b to the aforementioned
assignment specifications (see below). :base is the default.
While there is no specific minimum base memory requirement per vpar, the HPUX
kernel does require a certain amount of base memory to boot successfully. For
information on how much this should be, see the document Installing and Updating
Guide for HP-UX 11i v3 (11.31).
Appendix F (page 319), specifies the minimum portion of the total memory in the virtual
partition that must be configured as base memory when the virtual partition is up. If
the documented ratio is not maintained, the partition boot or online addition or deletion
of float memory may fail.
182 CPU, Memory, and I/O Resources (A.05.xx)