S3 backed write ahead log

How Continuity Scales Git to 300 Pushes Per Second With S3

Cursor's Continuity architecture treats S3 as the source of truth, not a backup. By demoting local NVMe drives to warm caches and separating replica coordination from consistency, the design achieves over 300 pushes per second with linear read scaling across 100 replicas. That's a practical rethinking of how Git storage should work at scale. For teams wrestling with repository bottlenecks, this approach is worth exploring, much like the compute challenges addressed in our piece on LLM post-training research.