Tag

event sourcing

2 cards

Cards

A normalised write model and a flat read model pulling a single schema in opposite directions, then CQRS splitting them into a command side that emits events and a query side building a search index, reporting table and cached summary

ArchitectureDay 95Nov 5, 2026

Reads And Writes Want Different Things

system-design cqrs event-sourcing

A traditional table keeping only an order's latest status beside an append-only event log of OrderPlaced, ItemAdded, PaymentReceived, OrderShipped and OrderCancelled folded into current state, with three benefits and three costs listed underneath

ArchitectureDay 94Nov 4, 2026

Store What Happened, Not What's True Now

system-design event-sourcing architecture