Goals of a Sysplex Environment


The goals of a sysplex environment are:

  • High availability

  • Capacity

  • Workload balancing

High availability means that the end user has access to the facilities and resources needed to perform some business function when it is needed. Parallel Sysplex allows you to have multiple IMS systems that can do the same work. These systems are called clones, which means that each IMS system definition is the same. The clones must have access to the same data and the capability to process the same transactions or work requests. High availability requires that you survive both planned outages, such as upgrades, and unplanned outages, such as abends. Even with clones, you need the capability to quickly restore any failed system.

Adequate capacity means that the servers have the resources to satisfy all of the work requests from their end users within the needed time frame. Parallel Sysplex allows you to meet capacity needs by easily adding and deleting cloned IMS systems. When you change your configuration in this way, you can route the work to the systems that can handle it.

Workload balancing is the spreading of work across the systems that can do it and spreading that work appropriately. Parallel Sysplex provides capabilities to automatically balance workloads. Proper balancing allows you to more easily handle unexpected peaks in workloads. Work balancing operates at its best when it can dynamically adjust to changes in the workload and changes in your hardware and software configurations.

IMS and other products, when used in a Parallel Sysplex, provide the facilities to increase availability, enhance capacity, and more easily balance workloads.



Introduction to IMS. Your Complete Guide to IBM's Information Management System
An Introduction to IMS: Your Complete Guide to IBMs Information Management System
ISBN: 0131856715
EAN: 2147483647
Year: 2003
Pages: 226

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