Hello, what are the key concepts for scalability in a cloud architecture? Should we scale horizontally or vertically, and how should this decision be made? What roles do elements like caching and load balancers play? Does this depend on the technology being used?
How do you scale cloud architecture, then?
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It was a 2-month project, and when the user count jumped from 1,000 to 50,000, we shifted the architecture from vertical to horizontal scaling. The first mistake was relying too much on the load balancer; the APIs crashed before we added a cache layer. We were using AWS, and switching from RDS to Aurora Serverless immediately improved scalability. If your database is a single point of failure, scalability is just a dream.