System information

20 Logical Partitions on System i5
Figure 1-16 New number of current virtual processors after addition
1.3.8 Configuring dedicated processors for the logical partition
Processor configuration is stored in the logical partition profile. When the logical partition is
started, a number of physical processors are assigned to this logical partition. When started,
the logical partition will be assigned the desired amount of processors. If the desired amount
of processors is not available, the minimum amount of processors will be assigned to this
logical partition. If no physical processors are available — for example, because of the failure
of physical processors — the logical partition cannot be activated.
At the first time the logical partition is created, you have to define the processor configuration
for the logical partition. To configure the logical partition with dedicated processors, select
Dedicated from Create Logical Partition Profile - Processors as shown in Figure 1-17.
Figure 1-17 Dedicated processing mode for logical partition with dedicated processors
Attention: When you try to add more processing units for a shared processor logical
partition, the number of desired physical processing units as the result of the addition must
be equal to or less than the desired number of virtual processors.