Cursor's Git Storage System: S3 as Source of Truth, Local Disk as Cache
xennygrimmato_ · x · 2026-08-21
Cursor unveiled the technical details of its Git storage system, Origin. The core architectural decision is to use S3 as the single source of truth (Write-Ahead Log) rather than a backup or tier, treating local NVMe as a disposable cache. This inversion eliminates the need for routing tables, consensus protocols, relational databases, and repair jobs required by GitHub's Spokes. It allows replication to scale elastically from 1 to 100 replicas based on traffic, mirroring best practices for ML weight storage.
Related event: Cursor Details Its S3-Centric Architecture for Hosting Git at Scale(3 posts)→
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