Size an AWS web tier for launch day, then survive losing a zone.
LVL 1A web tier on AWS
Names
Components
Drag onto the board, or tap to add.
Traffic
Compute
Data
Messaging
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.
Settings hover or tap a component, then its iconLink drag from any dot to another componentRemove select it, press DeleteBreak Break it in a part's settings arms it; it fails when you press Run testsCache the server asks it first. If the answer is there (a cache hit), the database is never asked. Only misses go on. Linking the cache to the database too is optional: the cache then loads from it on a miss.
Link color = the component it leaves:Entry pointsTraffic routingServersCacheStoragedown, unlinked or overloaded
Illustrative us-east-1 on-demand prices from late 2026. No data transfer, no free tier, no reserved or spot pricing.