© Copyright IBM Corp. 2002. All rights reserved. 177
Appendix A. Cluster 1600 scalability rules
This appendix describes maximum sizing and scalability rules for the Cluster
1600.
Cluster 1600 scaling
A Cluster 1600 with PSSP can consist of 2 to 128 AIX OS images (the 128 limit is
due to availability of systems for IBM labs to test, higher scalability configurations
are available by special bid).
An AIX OS image is defined as:
򐂰 A 7040 server (p690/p670) running as a full system partition or a 7028 server
(p630)
򐂰 An LPAR of a 7040 server
򐂰 A 7026 server (H80, M80, p660, 6H0/6H1, 6M1)
򐂰 A 7017 server (S70, S7A, S80, p680)
򐂰 An SP node
The following scalability rules apply:
򐂰 No more than 128 AIX OS images from the set (7040, 7028, 7026, 7017,
9076)
A
178 IBM ^ Cluster 1600 Managed by PSSP 3.5: Whats New
򐂰 No more than 32 physical servers from the set (7040)
򐂰 No more than 64 physical servers from the set (7026, 7028, 7040, 7017)
򐂰 No more than 16 physical servers from the set (7017)
򐂰 No more than 128 SP nodes
For example:
򐂰 32 p690s with 4 LPARs each or 16 p690s with 8 LPARs each
򐂰 32 p660s, 12 p690s with 4 LPARs each, 4 p690s with 8 LPARs each and 16
p630s
򐂰 12 p690s with 4 LPARs each, 16 p680s, 16 p660s, and 48 SP nodes

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