Platforms & theory
Cloud
Mental models for the big three.
- •175 XPIAM Mental ModelPrincipals, actions, resources — how requests get allow or deny.
- •200 XPStorage TiersObject vs block vs file — pick the right shape.
- •200 XPServerless & Cold StartsWhy p99 looks nothing like p50 on Lambda.
- •225 XPVPC NetworkingSubnets, routes, security groups, NACLs — why A can't reach B.
- •200 XPCost Anti-PatternsThe leaks every cloud bill has.
- •200 XPManaged DatabasesRDS vs Aurora vs DynamoDB vs Spanner — and what you actually buy.
- •200 XPEvent-Driven ArchitecturesSQS vs SNS vs EventBridge vs Kinesis vs MSK — picking from the messaging zoo.
- •200 XPSecrets & KMSSecrets Manager vs Parameter Store; envelope encryption; key rotation.
- •200 XPMulti-RegionActive-active vs pilot-light vs cold-DR — and the RTO/RPO trade.