Adding or removing virtual instances to handle traffic spikes.

Understanding the author's expertise adds weight to the resource. Professor Rajkumar Buyya is a **Redmond Barry Distinguished Professor and Director of the Cloud Computing and Distributed Systems (CLOUDS) Laboratory at the University of Melbourne, Australia. He is a Fellow of the IEEE and the founder/CEO of Manjrasoft Pty Ltd., a company that commercializes innovations in cloud computing. His standing in the scientific community is evidenced by his recognition as a Web of Science "Highly Cited Researcher" for six consecutive years since 2016. His contribution to the field, including this textbook and the open-source CloudSim toolkit, makes any lecture slides or presentations bearing his name a reliable source of academic excellence.

High. Users manage the operating system, middleware, database engines, and application code.

+-------------------------------------------------------+ | SaaS (Apps) | | Managed by Vendor (e.g., Salesforce, M365) | +-------------------------------------------------------+ | PaaS (Platform) | | Managed by Developer (e.g., Heroku, App Engine) | +-------------------------------------------------------+ | IaaS (Infrastructure) | | Managed by IT Admin (e.g., AWS EC2, Azure VM) | +-------------------------------------------------------+ 4. Deployment Paradigms

In the rapidly evolving landscape of Information Technology, few names resonate as profoundly as . His textbook, "Cloud Computing: Principles and Paradigms" (often co-authored with Christian Vecchiola and S. Thamarai Selvi), has become the gold standard for academic courses worldwide. As we navigate the complexities of distributed systems in 2025, the foundational concepts laid out in the 2021 PPT (PowerPoint) edition of this work remain more relevant than ever.