System information

Chapter 13. Virtual Partition Manager 399
– Minimum / Maximum Shared Processor Pool Units: A minimum of 0.10 processing
units is required for every full processor that may be utilized for the given partition.
Assign the values appropriately based on the range you want your partitions to utilize
unused processing cycles.
– Uncapped processing: You have the option to have your Linux partition shared
capped, or shared uncapped. See the shared processor section in the IBM Information
Center for more information about capped and uncapped processors.
http://www-1.ibm.com/servers/eserver/iseries/perfmgmt/pdf/lparperf.pdf
By default, an uncapped processing weight of 128 (medium) is assigned. A value of
255 indicates that the partition has a higher priority to utilize idle CPU cycles compared
to a partition with 128 (medium) or 64 (low). For example, if partition 3 had an
uncapped weight of 64 and partition 4 had an uncapped weight of 255, partition 4 gets
up to four times the unused processing resources that partition 3 received. A value of
zero is required to be set for partitions that are capped.
– Size of Partition Memory: The minimum memory requirement for Linux partition is
128 megabytes. At the following Web address, see the memory section in IBM eServer
Information Center for additional details.
http://publib.boulder.ibm.com/infocenter/eserver/v1r2s/en_US/index.htm?info/iphat/ip
hatlparmemory
Set the appropriate values based on your planning done with Logical Partitioning
Validation Tool (LVT).
– Virtual Ethernet Identifiers: A value of 1 indicates you are enabling one of the virtual
Ethernet communications ports for inter-partition communications between Linux or
i5/OS partitions. You can select up to 4 virtual Ethernet communications links.
Note: Considering that Virtual Partition Manager does not support dynamic movement of
resources, you might want to define your partitions as uncapped partitions to automatically
assign unused processing units to a partition that needs the resources.