1 parallel sysplex, 1 parallel sysplex described, Ibm ^ zseries 990 technical guide – IBM 990 User Manual
Page 168: Figure 7-1 sysplex hardware overview
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zSeries 990 Technical Guide
7.1 Parallel Sysplex
Figure 7-1 illustrates the components of a Parallel Sysplex as implemented within the zSeries
architecture. Shown is a z900 model 2xx ICF (CF01) connected to two z990 servers running
in Sysplex. There is a second Integrated Coupling Facility (CF02) defined within one of the
z990s, containing SysPlex logical partitions running z/OS.
Figure 7-1 Sysplex hardware overview
Also shown is the required connection between the Coupling Facility (CF01) defined on a
z900 turbo model (2064-2xx) or any z990 Server, and the Sysplex Timer, to support Message
Time Ordering.
7.1.1 Parallel Sysplex described
Parallel Sysplex technology is an enabling technology, allowing highly reliable, redundant, and
robust zSeries technologies to achieve near-continuous availability. A Parallel Sysplex is
comprised of one or more z/OS and/or OS/390 operating system images coupled via one or
more Coupling Facilities. The images can be combined together to form clusters. A properly
configured Parallel Sysplex cluster is designed to maximize availability. For example:
Hardware and software components provide for concurrent planned maintenance, like
adding additional capacity to a cluster via additional images, without disruption to
customer workloads.
Networking technologies that deliver functions like VTAM Generic Resources, Multi-Node
Persistent Sessions, Virtual IP Addressing, and Sysplex Distributor to provide
fault-tolerant network connections.
DASD
DASD
DASD
CF02
ICF
CF01
ICF
ESCON / FICON
Sysplex Timer
z/OS
z/OS
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IBM z900
Model 2xx
IBM z990
Sysplex
LPARs
Sysplex
LPARs
Required
connection from
CF on z900 2xx
or any z990 CPC
to Sysplex Timer
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