We've all been there: you add Redis, and your latency drops. But have you planned for the Thundering Herd? The Problem A Thundering Herd occurs when a massive, synchronized search of processes or user requests hits a backend resource at once. The Pseudo-Code Risk Most of us write logic like this: let data = await cache.get(key); if (!data) { data = await db.query(query); // The Bottleneck! await cache.set(key, data); } return data; If 100k users hit this code at the sam...