Configuration Rules 2-7
Logical partitions are divided on hardware module boundaries. For example,
each CPU module contains 2 CPUs, but you cannot have one CPU in one
partition, and the other CPU in another. Both CPUs on a module must be in
the same partition.
Each partition must have at least one CPU module, one memory module, and
one KFTIA or KFTHA I/O module. The combined partitions may include up to
nine modules (the limit of the TLSB card cage).
•
CPU modules are installed beginning in slot 0 and proceed upward by slot
number.
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I/O modules are installed beginning in slot 8 and proceed downward, to a
limit of three I/O modules.
•
Memory modules are installed beginning in the next-highest slot above the
CPU module(s) and proceed upward until all modules are installed, up to
slot 5 or 6 (depending on whether three or two I/O modules are installed,
respectively).
Note that in a three-partition system, there can only be three CPU modules,
three memory modules, and three I/O modules, since partitions allocate whole
modules and the total number of slots available is 9. The memory modules can
be of various sizes; disable interleaving for any configuration (set interleave
none). Figure 2–3 shows the allowed configuration for modules in the TLSB
card cage.
Allocating Modules to Partitions
Chapter 3 tells how you set console firmware environment variables to define
which CPU and I/O modules are contained in any particular logical partition.
You can allocate CPU modules and I/O modules to partitions in any
configuration you desire, as long as each partition has at least one I/O module
and one CPU module.
You specify memory mode for partitioning as isolate, which tells the console
firmware to distribute memory modules between partitions at module
boundaries. This is described in more detail in the next section.
