Compaq AlphaServer GS140 Getting Started page 43

With logical partitions

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Note that you must assign CPUs to a partition on module boundaries. CPU

modules can be assigned to partitions in any order.

Three-Partition System

For a three-partition system, three CPU modules is the maximum allowed

(since there must also be three memories and three I/O modules, and the total

number of slots is 9.) In this case, assigning CPUs to partitions is fairly

straightforward. Again, the CPUs in slot 0 must be assigned to partition 0. The

CPUs in slots 1 and 2 can be assigned as desired. Figure 3–2 shows the

construction of a bit mask for three partitions, with the CPUs in slot 0 assigned

to partition 0, the CPUs in slot 2 assigned to partition 1, and the CPUs in slot 1

assigned to partition 2. You would use the console commands:

P00>>> create –nv lp_cpu_mask0 3

P00>>> create –nv lp_cpu_mask2 30

P00>>> create –nv lp_cpu_mask1 C

NOTE: Once the desired environment variables have been created with

create –nv, you can set them to different values with the set command.

Environment Variables that Create Logical Partitions

3-5

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