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Git as a Service for Large-Scale Monorepos

1 post · Jul 2026

What this trail covers

Uber has developed GitFarm, a 'Git as a Service' platform to address the significant performance bottlenecks and infrastructure overhead associated with traditional Git workflows in large-scale monorepos. GitFarm acts as a centralized Git client, executing Git commands via a high-performance gRPC API within secure, ephemeral sandboxes backed by pre-warmed repository and container pools. This approach eliminates local clones, provides rapid access to repository checkouts (under 500ms), and drastically reduces client-side resource utilization by over 80% while preserving the flexibility of native Git semantics. The system enforces identity-scoped authorization, supports multi-command workflows, and leverages specialized back-end clusters for workload isolation.

All Uber trails
  1. GitFarm: Git® as a Service for Large-Scale MonoreposThis post details the architecture and implementation of GitFarm, Uber's Git-as-a-Service platform. It introduces the GitFarm Gateway for authentication, authorization, and load balancing, and the GitFarm Backend for request processing, including repository synchronization and sandbox management. Key innovations include a pooling model for pre-warmed repository checkouts and sandbox containers to reduce latency to under a second, and a bidirectional gRPC streaming API for multi-command workflows. The system also employs specialized clusters for workload isolation to prevent noisy neighbor effects.