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What is a Sysplex?

Everyone talks about availability and how important it is to avoid failures, but what about planned outages? How do you maintain availability for your customers when you need to upgrade software levels, put on fixes, or modify server configurations? This is where the Parallel Sysplex comes in. It provides end user availability by eliminating many "Single Points of Failure" (SPOFs). This presentation is a beginner's level overview of Sysplex and Parallel Sysplex and how they can provide value to your business.


With IBM's Parallel Sysplex technology, you can harness the power of up to 32 z/OS systems, yet make these systems behave like a single, logical computing facility. What's more, the underlying structure of the Parallel Sysplex remains virtually transparent to users, networks, applications, and even operations.

To accomplish all this, the z/OS Parallel Sysplex combines two critical capabilities: The first is parallel processing, and the second is enabling read/write data sharing across multiple systems with full data integrity.

This combination makes the z/OS Parallel Sysplex unique among every other system, solution, or architecture available today. And, it results in a scalable growth path that extends beyond billions of instructions per second.

IBM Parallel Sysplex

Parallel Sysplex for z/OS Getting Started Library


What is a Parallel Sysplex?

What is a Parallel Sysplex? A sysplex is a collection of z/OS systems that cooperate, using certain hardware and software products, to process work. It is a clustering technology that can provide near-continuous availability.

A conventional large computer system also uses hardware and software products that cooperate to process work. A major difference between a sysplex and a conventional large computer system is the improved growth potential and level of availability in a sysplex. The sysplex increases the number of processing units and z/OS operating systems that can cooperate, which in turn increases the amount of work that can be processed. To facilitate this cooperation, new products were developed and old products were enhanced.

A Parallel Sysplex is a sysplex that uses multisystem data-sharing technology. It allows direct, concurrent read/write access to shared data from all processing
http://www.redbooks.ibm.com/redbooks/pdfs/sg246366.pdf


Systems Programmer's Guide to: z/OS System Logger

The z/OS System Logger is a function provided by the operating system to exploiters running on z/OS. The number of exploiters of this component is increasing, as is its importance in relation to system performance and availability. This IBM Redbook provides system programmers with a solid understanding of the System Logger component and guidance about how it should be set up for optimum performance with each of the exploiters.

Parallel Sysplex Operational Scenarios

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