Introduction to the new mainframe LargeScale Commercial Computing

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. 2

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. 3

Introduction to the new mainframe What is a mainframe? (Cont…) Ø Compatibility with operating systems, applications and data Ø Centralized control of resources Ø HW and operating systems share disk access Ø A STYLE of operation Ø Thousands of simultaneous I/O operations Ø Clustering technologies Ø Additional data and resource sharing capabilities © Copyright IBM Corp. , 2006. All rights reserved. 4

Introduction to the new mainframe Evolving architecture Architecture describes the organizational structure of a system Ø More and faster processors Ø More physical memory and greater virtual memory addressing capability Ø Dynamic capabilities for upgrading HW and SW Ø Enhanced I/O devices and more and faster paths (channels) Ø Sophisticated I/O attachments Ø Increased ability to divide resources into multiple, logically independent and isolated systems, each running its own operating system. Ø Enhanced clustering technologies (e. g. Parallel Sysplex) © Copyright IBM Corp. , 2006. All rights reserved. 5

Introduction to the new mainframe 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 © Copyright IBM Corp. , 2006. All rights reserved. 6

Introduction to the new mainframe Factors contributing to mainframe use Ø Ø Ø Ø Capacity Scalability Integrity and Security Availability Access to large amounts of data Systems management Autonomic capabilities © Copyright IBM Corp. , 2006. All rights reserved. 7

Introduction to the new mainframe Typical mainframe workloads © Copyright IBM Corp. , 2006. All rights reserved. 8

Introduction to the new mainframe Typical batch use © Copyright IBM Corp. , 2006. All rights reserved. 9

Introduction to the new mainframe Typical online use © Copyright IBM Corp. , 2006. All rights reserved. 10

Introduction to the new mainframe 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. © Copyright IBM Corp. , 2006. All rights reserved. 11

Introduction to the new mainframe Key terms • Architecture • • • Batch Processing Compatibility Data integrity High Availability IBM System z Infrastructure • Mainframe • Online transaction processing (OLTP) • Punched card • RAS • Scalability • Security © Copyright IBM Corp. , 2006. All rights reserved. 12