S3 Express hot lookup
Put hot keys in an Express directory bucket next to compute, bake them off against Standard in the same AZ, and read the live ratio on a small harness dash.
Express keeps the hot set in one AZ on purpose. This lab stands up a dedicated VPC, seeds identical keys into Express and Standard, runs continuous GETs from an m7g.large in that AZ, then tears the stack down — image pipeline included when you are finished.