# Scaling Git at OpenAI

> OpenAI's new Git system handles 1 billion users with faster pushes and reliable merges.
- Title: Scaling Git at OpenAI · OpenAI | Shortify
- Summary: OpenAI's new Git system handles 1 billion users with faster pushes and reliable merges. OpenAI launched Pando, a Git system that scales to handle 1 billion…
- Keywords: openai, git, pando, codex, monorepo, git protocol, source control, github, git ecosystem, agent-scale, technology, Scaling
- Source: OpenAI — https://openai.com/index/scaling-git-at-openai
- Read time: 1 min
- Topics: openai, git, pando, codex, monorepo, git protocol, source control, github, git ecosystem, agent-scale, ai, technology
## Why OpenAI needed new Git system
OpenAI's monorepo faced slow fetches and failed merges as Codex increased parallel development demands.
## Pando's dual goals
Pando scales writes across branches and maximizes read throughput for 1 billion users.
## Pando's causal consistency model
Pando uses causal consistency to allow parallel writes without full repository consistency.
## Pando vs. existing Git systems
Pando outperforms three-phase commit and write-ahead log systems in high-concurrency environments.
## Pando's packfile reuse
Pando reuses packfiles across clients to reduce network bandwidth and server load.
## Pando's metadata store
Pando stores ref versions in a horizontally scalable metadata service for efficient packfile selection.
## Pando's compaction system
Pando uses geometric compaction to reduce fetch latency and improve packfile efficiency.
## Pando's deployment timeline
Pando moved from development to production in 10 weeks for OpenAI's monorepo.
## Pando's performance metrics
Pando cut median push latency by 5x and delivers nearly a petabyte of git data per day.
## Pando's cache efficiency
Pando achieves 99% cache hit rates with regional caches for low-latency git operations.
## Pando's contribution to Git
OpenAI contributed improvements to git's packfile-uri and explicit haves features.
## Pando's future plans
OpenAI will share Pando technology with other organizations for agent-scale development.
## Pando's impact on Codex
Codex helped developers migrate to Pando with skills for checkout and branch management.
## Pando's scalability
Pando handles 57 terabytes of git packs in one hour with minimal server resources.
## Pando's real-world testing
Pando reduced median push latency by 80% and improved merge reliability in OpenAI's monorepo.
## Pando's next steps
OpenAI will share Pando's technology with other organizations for agent-scale development.
## Key takeaway

OpenAI launched Pando, a Git system that scales to handle 1 billion users with 5x faster pushes and 99% cache efficiency.