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Chapter 1: The new mainframe

Chapter 1: 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. What is a mainframe ?.

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Chapter 1: The new mainframe

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  1. Chapter 1: The new mainframe

  2. 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

  3. 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 smaller-scale machines.

  4. 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

  5. Evolving architecture • 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) • Architecture describes the organizational structure of a system

  6. Mainframe facts • Mainframes in our midst • Hidden from the public eye • Who uses mainframes? • Most Fortune 1000 companies use a mainframe environment • 60% of all data available on the Internet is stored on mainframe computers • Why mainframes? • Large-scale transaction processing • Thousands of transactions per second • Support thousands of users and application programs • Simultaneously accessing resources • Terabytes of information in databases • Large-bandwidth communications

  7. Factors contributing to mainframe use • Capacity • Scalability • Integrity and Security • Availability • Access to large amounts of data • Systems management • Autonomic capabilities

  8. Typical mainframe workloads

  9. Typical batch use

  10. Typical online use

  11. Summary • The New Mainframe: • Plays a central role in the daily operations of the world’s largest organizations – and the daily lives of most people. • Is known for its reliability, security, and enormous processing capabilities. • Is designed for processing large scale workloads and serving thousands of users and transactions concurrently. • Is managed by highly skilled technical support staff. • Runs a variety of operating systems.

  12. Architecture Batch Processing Compatibility Data integrity High Availability IBM System z Infrastructure Key terms • Mainframe • Online transaction processing (OLTP) • Punched card • RAS • Scalability • Security

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