Cloud computing is presented not as a trendy new technology, but as the outsourcing of application and physical server hosting. The discussion highlights the challenges of scaling websites to handle increased user load, explaining how finite resources like CPU, RAM, and storage create capacity limits. Traditional solutions, such as adding more servers and load balancers, introduce complexities like single points of failure. Cloud providers offer virtualized servers and infrastructure as a service (IaaS) to abstract away hardware management, enabling software-defined infrastructure. Virtualization and containerization technologies, like Docker, optimize resource utilization, while platform as a service (PaaS) options, such as Heroku, further simplify application deployment by managing scaling and availability. Database replication strategies, including master-slave and master-master setups, address data storage scalability and redundancy.
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