# Shopify swaps Redis for MySQL to handle inventory reservations at scale

Shopify migrated its inventory reservation system from Redis to MySQL, a move that improved scalability and reliability. The change allowed the platform to handle surges in traffic, such as during high-demand sales events, without performance degradation. This case study highlights practical database engineering choices for large-scale systems.

**Importance:** 3/5

## Sources

### Technology
- [Hacker News](https://shopify.engineering/scaling-inventory-reservations) — Sat, 08 Aug 2026 22:32:50 +0000