High-Availability Shopping Cart Architecture

System Design diagram · made in Skemio

High-availability shopping cart architecture showing client browser, CDN edge, Cart Service with Redis session store, and Checkout with SQL DB.

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What it shows

Edge cookies store cart tokens to minimize roundtrips on browse actions.
Replicated session stores like Redis or DynamoDB handle fast writes.
Checkout transitions transient cart state to durable SQL order tables.

The takeaway

Separate transient high-throughput cart storage from durable ACID order processing.

#SystemDesign
#WebArchitecture
#ECommerce
#Redis
#Microservices

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