Standard Sp System; Adding Sp-Attached Servers To An Sp System - IBM RS/6000 SP Handbook

Scaling up an existing CES system to an SP system: This is the case when
you have a CES system and you want to make it a larger scale SP system.
Therefore your Enterprise Servers will become SP-attached servers and they
will beneficiate of the advantages of the servers attached to the SP system.
For details on installation and migration on SP/CES systems, see IBM Parallel
System Support Programs for AIX: Installation and Migration Guide, GA22-7347.

10.4.1 Standard SP system

If you want to develop an SP system using the standard thin, wide and/or high
SP nodes, use the steps described in Chapter 2, "Installing and Configuring a
New RS/6000 SP System" in IBM Parallel System Support Programs for AIX:
Installation and Migration Guide, GA22-7347 to install this type of system.

10.4.2 Adding SP-attached servers to an SP system

The PSSP software is manages the SP-attached server as though it is a node in
a frame of its own. However, the SP-attached server is treated differently than an
SP frame and has the following characteristics:
It is the only node in its frame. the SP-attached server begins in slot number 1
and occupies the full 16 slots in the frame, using slot number 1 to calculate its
node number. Therefore, 16 is added to that node number to derive the next
available node number. However, the next node number assigned is
dependent on the frame number of the next node.
It connects to an available switch port number of an existing SP frame. An
available switch port number is defined as a switch port number not used by
any other node. Note that the switch port number associated with a slot may
still be available if the slot is occupied by a node. For example, a high node
occupies four slots but only uses the switch port number associated with the
lowest slot it occupies. Any switch port number associated with the other
three slots is available.
It cannot be within a switch capsule (between a switched frame and any
non-switched expansion frame within a capsule). Give it a frame number that
fits before, between, or after switch capsules.
The SP-attached server can be configured with the SP Switch (it is not
supported with the SP Switch2).
Assume an SP system environment including a SP Switch capsule composed of
frame A (which hosts the SP Switch), frame A+1 and frame A+2), and a second
SP Switch capsule composed of frame B (which hosts the SP Switch) and frame
B+1.
Chapter 10. Clustering configurations
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