Hacker News·5 min read·medium
Shopify replaced Redis with MySQL for inventory reservations–and it scaled
A
adletbalzhanov
✦AI Summary
Shopify successfully migrated its inventory reservation system from Redis to MySQL by utilizing the SKIP LOCKED feature. This transition allowed the platform to handle massive transaction volumes during peak events like Black Friday without overselling.
How we used SKIP LOCKED, composite primary keys, and connection visibility to hit our scale targets.
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