SY
System Design Simple
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🌐 dev.toSource
Login anomaly detection: our synthetic lab compared a fixed night rule with per-user baselines, cutting false alarms from 667 to 32 across 8,457 logins.
1 day ago
🌐 dev.toSource
System design as engineering, on a news feed: API, data model, fan-out on read vs write with cost formulas, Redis timelines, cursors, hot keys and a benchmark.
3 days ago