☁️ Cloud foundations
Regions and zones, storage tiers, events, queues, caches and observability: the ideas shared by every cloud.
6 missions🧪 2 live
CSE41Region & Zone ResilienceA results website must survive a data-centre outage. Place copies across zones and regions and test a failure.
CSE42Storage Lifecycle CostOld exam scans are rarely read. Move them to cheaper tiers with lifecycle rules and compare the monthly bill.
CSE43Serverless Order FlowAn order event triggers functions for payment check, stock and email. Watch the events flow and fail one step.
CSE44Retries & Dead-Letter QueueSome messages always fail. Set retries with back-off and a dead-letter queue so they do not block the rest.
CSE45Cache Hit & Miss PuzzleA slow database serves the results page. Add a cache, choose a time-to-live and watch hit rate and speed.
CSE46Observability DetectiveUsers say the site is slow. Use metrics, logs and traces together to find the slow service.
🗺️ VNet / VPC network
Internet traffic reaches only the public load balancer; the app and database sit in private subnets and each hop is filtered by security rules.
Drag to turn, scroll to zoom, tap a block to see what it is.
The 2D diagram shows the exact flow, ports and trust boundaries. The 3D scene is a concept view of the same parts; packets travel along the same arrows.
📚 Reference documents
- Azure Well-Architected Framework · Microsoft Learn
- AWS Well-Architected Framework · AWS