IBM-operativsystemer

In the tech-centric world of today, where agile startups and cutting-edge technologies capture headlines, the mention of 'mainframes' often evokes nostalgic memories of large, room-filling machines with spinning tapes. Yet, these iconic symbols of early computing are far from extinct. In fact, the mainframe is deeply embedded in the foundational infrastructure of numerous global organizations, silently powering critical applications from banking to aviation."Mainframe Reimagined: Harnessing the Power of Legacy Systems in the Digital Age" is not merely a homage to these enduring giants of the computing world. Rather, it's a journey into understanding their persistent relevance, their adaptability, and the vast potential they offer for innovation.Modernizing the mainframe is not about relegating it to the annals of history. On the contrary, it's about evolving and integrating these systems into the rapidly advancing digital landscape of the 21st century. As you delve into the chapters that follow, you will discover that the mainframe's story is one of resilience, innovation, and untapped potential.Why modernize? That's a question we address at length. There's a compelling business case, of course-cost savings, increased efficiency, and improved scalability, to name a few. But beyond the numbers, there's a strategic imperative for organizations to remain agile and competitive in a constantly evolving technological landscape.This book will illuminate the modernization strategies available, offering insights into their benefits and challenges. By showcasing real-world case studies, we aim to provide a tangible and relatable understanding of how companies have successfully navigated their modernization journeys. Furthermore, in recognizing the importance of security and the rapid growth of emerging technologies, we delve deep into how mainframes can adapt and thrive in these new paradigms.For professionals who cut their teeth on mainframe technologies, this book will offer a fresh perspective on a familiar friend. For the newer generation of tech enthusiasts, it's an invitation to explore and appreciate the depth, complexity, and potential that mainframes bring to our digital age.As we stand on the brink of another technological renaissance, it is essential to not only look forward but also to recognize and leverage the power of what we've built in the past. It is our hope that by the end of this book, you'll not only view mainframes with renewed respect but also with excitement for the future possibilities they present.

Welcome to "Embracing Modernity: A Comprehensive Guide to Mainframe Containerization." This book is designed as a comprehensive journey that will guide you from understanding the basic concepts of mainframes and containerization to the complexities of implementing and managing containers in a mainframe environment.Mainframes have been the cornerstone of the business world for many years, powering most of the critical operations in sectors such as banking, healthcare, and transportation. However, in an increasingly digital and agile world, there is a growing need for these systems to be more flexible, scalable, and compatible with modern application development and deployment practices.Containerization represents a technological breakthrough that addresses these needs. By encapsulating applications in isolated user spaces known as containers, it allows for a level of portability, simplicity, and efficiency that was previously unattainable.Despite the clear benefits, the path to integrating containerization into mainframe systems is not without its challenges. Many organizations struggle with understanding the best practices, tools, and methodologies to achieve this integration smoothly and effectively.This book aims to address these challenges head-on. We explore the inner workings of both mainframes and containerization before delving into their intersection. We also offer a detailed overview of the tools and platforms central to mainframe containerization, such as Docker and Kubernetes."Embracing Modernity: A Comprehensive Guide to Mainframe Containerization" is more than just a technical manual; it's a roadmap for organizations and individuals looking to usher their mainframes into the modern age. Whether you are a CIO looking to modernize your company's IT infrastructure, a DevOps engineer tasked with implementing containers in a mainframe environment, or an IT student interested in learning about this emerging field, this book is for you.

The mainframe - a powerful, resilient, and secure computing platform - is at the heart of many global businesses, handling immense volumes of transactions daily. However, in today's rapidly evolving technological landscape, maintaining efficiency and competitiveness requires modernization. This imperative has brought continuous integration and continuous deployment (CI/CD) practices into the limelight, extending even to the world of mainframes.This book, "Modernizing Mainframes: A Comprehensive Guide to Implementing Continuous Integration and Continuous Deployment (CI/CD)", is designed to bridge the gap between traditional mainframe operations and the accelerating world of DevOps. It provides the readers with an understanding of how they can bring the speed and agility of CI/CD into their mainframe environments without compromising on the security, stability, and scalability that mainframes offer.Written with a diverse audience in mind, this book aims to assist IT professionals, DevOps engineers, mainframe experts, and decision-makers as they navigate the transformation journey. By combining comprehensive theoretical knowledge, practical steps, real-life examples, and future trends, it provides a foundation to implement, adapt, and optimize CI/CD practices in mainframe environments.The book begins with a review of the basics of mainframes and CI/CD, setting the stage for the detailed discussions that follow. It then delves into the specific challenges and benefits of implementing CI/CD in a mainframe environment. The middle chapters provide a roadmap for implementing CI/CD, including details about various tools, steps, and best practices. Case studies are provided to illustrate real-world applications of the concepts presented. The book concludes with a look at future trends, anticipating the trajectory of mainframe CI/CD practices."Modernizing Mainframes" does not promise a one-size-fits-all solution. Instead, it encourages readers to understand the unique aspects of their own mainframe environments and align them with the best practices in CI/CD. We hope this book serves as a trusted guide in your journey towards a more agile, efficient, and future-ready mainframe environment.

In der Informatik sind einige Fachleute der Meinung, dass das Mainframe Computing seine bedeutende Zeit berschritten hat. In den letzten 10 Jahren ist die Mainframe-Ausbildung weiter eingeschränkt worden, d.h., Vorlesungen für interessierte Studenten an deutschen Universitäten und Fachhochschulen existieren teilweise nur noch online im E-Learning. Das betrifft auch die dazugehörigen praktischen Übungen. Diese Entwicklung widerspricht insgesamt dem Bedarf von Großrechner-Fachpersonal in mittleren und großen Unternehmen. In diesem Bereich ist das Problem dadurch gewachsen, dass Mitarbeiter in den Ruhestand gewechselt sind und nicht mehr zur Verfügung stehen. In dem Buch Einführung in z/OS und OS/390 wurde bereits zu diesem Thema Stellung bezogen. Der Ist-Zustand von Mainframe-Fachpersonal auf dem IT-Arbeitsmarkt ist weiter geschrumpft. Die Universität Leipzig hat zusammen mit dem Institut für Informatik der Universitt Tübingen in der Vergangenheit versucht, diesen Prozess aufzuhalten. Es wurden Vorlesungen in Leipzig, Tübingen, Frankfurt (Frankfurt School of Finance & Management) zum Thema Mainframe Server gehalten in der Hoffnung, Studenten und Interessenten in das Mainframe Computing einzuführen. Das vorliegende Lehrbuch Mainframe System z Computing enthält wesentliche Änderungen gegenüber der 1. Auflage des Buches Einführung in z/OS und OS/390. Dazu zählen vordergründig Kapitel zur Hardware aktueller IBM-System-z-Server (z12, z15, z16). Es gibt insbesondere praktische Erkenntnisse und Erfahrungen zu den Themen DB2, IMS, CICS, WebSphere MQ, SMF und z/OS Connect EE. Das betrifft z.T. Nutzer mit normalen und auch solche mit Administrator-Rechten.

The mainframe has long been the backbone of the computing world, powering critical applications in various industries, including finance, healthcare, government, and transportation. Its unmatched reliability, scalability, and performance have made it a trusted solution for managing vast amounts of data and complex transactions. Despite the emergence of new technologies, the mainframe continues to hold a significant position in the IT landscape.However, with the increasing reliance on technology and the ever-evolving threat landscape, mainframe cybersecurity has become a critical concern for organizations. This book, "Mainframe Cybersecurity: A Comprehensive Guide," aims to provide a detailed understanding of mainframe security principles, best practices, and methodologies to protect these vital systems from potential threats and vulnerabilities.Our primary goal is to provide a valuable resource for IT professionals, security practitioners, mainframe administrators, and developers seeking to strengthen their knowledge of mainframe security. Whether you are new to the world of mainframes or an experienced professional, this book will serve as a comprehensive guide to help you navigate the complexities of securing mainframe environments.We hope that this book not only enhances your understanding of mainframe cybersecurity but also serves as a practical guide for implementing effective security measures to protect your organization's mainframe assets. As you progress through the chapters, we encourage you to apply the concepts and strategies discussed to your specific mainframe environment, keeping in mind the unique challenges and opportunities that it presents.

Mainframe systems programming is a critical field that requires a deep understanding of the underlying hardware, operating systems, and software components that comprise mainframe computer systems. Mainframes are still widely used in many industries, particularly in finance, healthcare, and government, where they offer unparalleled processing power, reliability, and security. As a mainframe systems programmer, you will be responsible for configuring, optimizing, and maintaining the mainframe system's hardware and software to ensure it runs efficiently and effectively. This involves a range of tasks, including installing and configuring software, managing system resources, monitoring system performance, and resolving any issues that arise. This book aims to provide a comprehensive introduction to mainframe systems programming, covering the fundamental concepts, tools, and techniques required to work with these complex systems. Whether you are a seasoned programmer looking to expand your skillset or a newcomer to the field, this book will provide you with the knowledge you need to become an effective mainframe systems programmer. Throughout the book, we will cover a range of topics, including mainframe hardware architecture, operating system fundamentals, system programming languages and tools, and techniques for troubleshooting and performance tuning. We will also explore emerging trends and technologies in the field, such as virtualization and cloud computing. Ultimately, our goal with this book is to provide you with a solid foundation in mainframe systems programming that will enable you to tackle complex projects and effectively manage mainframe systems in a professional setting. We hope you find this book informative, engaging, and useful as you embark on your journey into the exciting world of mainframe systems programming.

"In the decades between the Great Depression and the advent of cable television, when daily newspapers set the conversational agenda for the people of the United States, the best reporter in the business was a rumpled, hard-drinking figure named Homer Bigart. His reporting left marks on history. In 26 years at the New York Herald Tribune and 17 more at the New York Times, Bigart chronicled and brought to life the events that defined the era - wars in Europe, the Pacific, Korea, and Vietnam, the civil rights movement, the creation of Israel, the end of colonialism in Africa, and the Cuban revolution. He was one of the first reporters to visit and describe Hiroshima after the atomic bomb. He was the first correspondent to penetrate the Haganah, the militant Zionist underground in Palestine. He recounted the trial of Adolf Eichmann, the Army-McCarthy hearings, and the court-martial of William Calley. A model of versatility, he also wrote with verve and compassion about strip mining in Kentucky, squalor on the Bowery and the murder of a shopkeeper in Harlem. Despite two Pulitzers and a host of other prizes, Bigart never sought fame; when he retired from the New York Times in 1972, he quickly faded from public view, and few today know the extent to which he was esteemed by his peers and those who came after, including Neil Sheehan and David Halberstam. This is the first comprehensive biography to encompass all of Bigart's reporting, not just his war reporting"--