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Shopify replaced Redis with MySQL SKIP LOCKED for inventory reservations. DoorDash replaced Redis Cluster with stateless Kvrocks. The lesson isn't "Redis is bad" — it's about matching infrastructure to access patterns.
AdminAugust 5, 202612 min read
Redis does more; Memcached does one thing faster. Here's exactly when that trade-off matters — plus why Valkey is now the open-source default in 2026.
AdminAugust 5, 202614 min read
Redis is fast because of specific design decisions — a reactor-pattern event loop, copy-on-write snapshots, compact in-memory encodings — not just because it's in-memory.
AdminMay 15, 202611 min read