Acknowledgments

A book of this scope does not emerge from a single source of knowledge. It is built on decades of work by the IBM DB2 engineering teams, the documentation writers who have maintained the IBM Knowledge Center through every release, and the global community of DB2 professionals who share their expertise in forums, user groups, conferences, and blog posts.

The DB2 Community

The International DB2 Users Group (IDUG) has been the beating heart of the DB2 community for decades. The technical presentations shared at IDUG conferences -- by practitioners solving real problems in real production environments -- represent some of the most valuable DB2 education available anywhere. Many of the performance tuning patterns, administration practices, and architectural decisions described in this book trace their origins to techniques first shared at IDUG sessions by DBAs who had no obligation to share but did so anyway. That generosity defines the DB2 community.

The z/OS DB2 community in particular deserves recognition. Mainframe DB2 professionals operate in an environment where a single mistake can affect millions of transactions and billions of dollars. The culture of rigor, testing, and documentation that this community maintains is something the broader technology world would benefit from studying. If you are entering this community, you are joining a tradition of excellence.

The DB2 for LUW community has grown substantially with the rise of containerized deployments, cloud-native architectures, and the Db2 Community Edition. The contributors who build tools, write tutorials, and answer questions on Stack Overflow, IBM developerWorks (now IBM Developer), and Reddit's database forums have lowered the barrier to entry for a new generation of DB2 professionals.

IBM Documentation and Engineering

IBM's Knowledge Center (now IBM Documentation) is an extraordinary resource -- millions of pages of technical documentation covering every DB2 feature, command, and configuration parameter across every supported version and platform. While this book exists in part because that documentation is difficult to navigate as a learning resource, it remains the definitive reference resource, and this book frequently directs readers to specific Knowledge Center topics for the most current and authoritative information.

The DB2 development labs in Toronto (LUW) and San Jose (z/OS) have built and maintained one of the most reliable database systems in the history of computing. Every feature described in this book was designed, implemented, tested, and documented by those teams. The longevity of DB2 -- over four decades of continuous development -- is a testament to the quality of that engineering.

The Open-Source Community

This book is built with mdbook, an open-source tool for creating books from Markdown files. The mdbook maintainers and contributors have created a publishing system that makes it possible to produce a professional-quality textbook and distribute it freely.

The broader open-source textbook movement -- exemplified by projects like OpenStax, the Open Textbook Library, and countless individual authors who have made their expertise available under open licenses -- demonstrates that high-quality educational materials do not have to be expensive. This book follows that tradition.

Technical Reviewers and Contributors

This is a living document released under CC-BY-SA-4.0. Every reader who files an issue, submits a correction, or contributes an improvement becomes part of the team that makes this book better. The acknowledgments will grow as the community grows.

If you find an error, have a suggestion, or want to contribute a case study from your own DB2 experience, the source repository welcomes your contribution. See the CONTRIBUTING.md file for guidelines.

Personal

To every DBA who has ever been woken at 3 AM by a pager, diagnosed a production issue while half-asleep, fixed it, gone back to bed, and then shown up at 8 AM to explain what happened -- this book is for you. Your work keeps the world running, even when the world does not notice.

And to everyone who is about to begin that journey: welcome. You have chosen a field where your work matters. The systems you will manage process the transactions that pay people's salaries, approve their insurance claims, file their tax returns, and move their money safely across the world. That is worth learning well.

If you have contributed to this book and your name does not appear here, please submit a pull request. Recognition matters.