Introdução a mainframe
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Introduction to the new mainframe: Large-Scale Commercial Computing Chapter 1: The new mainframe© Copyright IBM Corp., 2006. All rights reserved.
Introduction to the new mainframe
Chapter 1 objectives Be able to:
• Explain why business data resides on mainframe • List typical uses of mainframes • Describe the benefits of mainframe computing • Outline the major types of workloads for which mainframes are best suited
© Copyright IBM Corp., 2006. All rights reserved.
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Introduction to the new mainframe
What is a mainframe ?
A mainframe is what businesses use to host their commercial databases, transaction servers, and applications that require a greater degree of security and availability than is commonly found on smallerscale machines.
© Copyright IBM Corp., 2006. All rights reserved.
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Introduction to the new mainframe
What is a mainframe? (Cont…) Compatibility with operating systems, applications and data Centralized control of resources HW and operating systems share disk access A STYLE of operation Thousands of simultaneous I/O operations Clustering technologies Additional data and resource sharing capabilities
© Copyright IBM Corp., 2006. All rights reserved.
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Introduction to the new mainframe
Evolving architecture Architecture describes the organizational structure of a system
More and faster processors More physical memory and greater virtual memory addressing capability Dynamic capabilities for upgrading HW and SW Enhanced I/O devices and more and faster paths (channels) Sophisticated I/O attachments Increased ability to divide resources into multiple, logically independent and isolated systems, each running its own operating system. Enhanced clustering technologies (e.g. Parallel Sysplex)
© Copyright IBM Corp., 2006. All rights reserved.
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Introduction to the new mainframe
Mainframe facts Mainframes in our midst
• Hidden from the public eye
Who uses mainframes?
• Most Fortune 1000