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Level 04a, June 21, 2004
Chapter 7. Parallel Sysplex
Parallel Sysplex Planning
This chapter is intended to provide guidance to those customers who operate in a
Parallel Sysplex environment. A Parallel Sysplex typically involves multiple
processors and coupling facilities, shared I/O devices, and a host of interconnection
possibilities. Detailed planning for a Parallel Sysplex is essential to meet technical
objectives, such as performance and high availability, within the constraints of a
specific raised floor configuration. Consider using the zSeries Fiber Optic Cabling
Service to plan your sysplex environment. A list of tasks the Service can perform is
provided under "zSeries Fiber Cabling Service" on page 6-1 Different technologies
for servers, links and coupling facilities affect your ability to configure a productive
sysplex. Following are some guidelines to help you better plan for multiple system
interconnection.
The basic premise for a successful Parallel Sysplex installation is to centralize the
physical location of the coupling facilities, and then position the sysplex servers
around that center.
1. Position the coupling facilities (or servers with internal coupling facilities) in the
2. Arrange the sysplex in two rows, with the fronts of servers and coupling facilities
© Copyright IBM Corp. 2002, 2004
®
center of an open area of raised floor large enough to accommodate all of the
servers and other coupling facilities to which you want to connect.
= 610 mm (24 in) floor tiles
= Perforated floor tile
v Use physical planning information for each type of server/coupling facility you
intend to add to the Parallel Sysplex to help determine how much floor space
you will need.
v Remember to consider weight distribution, service clearances, power, and
cooling for each piece of equipment you want to include.
facing each other (see the illustration under "Considerations for Multiple System
Installations" on page 2-9). Allow a 1.22 meter (48 inch) aisle width between the
rows. Although this may be a larger aisle than you have used before, your
Parallel Sysplex will benefit from the improvement in cooling that a wider aisle
provides (see the illustration under "Considerations for Multiple System
Installations" on page 2-9).
Note: The system air flow illustration shows a minimum aisle width of 941 mm
(37 in). Although this width is adequate for a congested computer room
floor, it is the minimum you should use. An aisle 1.22 m (48 in) wide will
Central
Coupling
Facilities
Central
Coupling
Facilities
= Cool aisle, 1.22 meters (48 inches) wide
= Exhaust (heated air from equipment)
7-1
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