tl;drPress enter or click to view image in full sizeCamera → N3 → S3 FallbackWe used S3 as a landing zone for Nanit’s video processing pipeline (baby sleep-state inference), but at thousands of uploads/second, S3’s PutObject request fees dominated costs. Worse, S3’s auto-cleanup (Lifecycle rules) has a 1-day minimum; we paid for 24 hours of storage on objects processed in ~2 seconds. We built N3, a Rust-based in-memory landing zone that eliminates both issues, using S3 only as an overflow buffer...