Inside GitHub's new Git storage architecture

Sciencegithub.blogSince 2018

Inside GitHub's new Git storage architecture

GitHub's new Git storage architecture is built so thousands of agents can push to a single repository at once. Here's how it works.

Quick read

A technical overview of GitHub’s new Git storage architecture, “Project Rubicon,” designed to handle thousands of concurrent writes to a single repository. It explains the design goals and how virtual replicas, Azure Blob Storage, and decoupled components let GitHub scale writes and reads while keeping Git behavior unchanged.

  • Serve thousands of writes per second with virtual replicas
  • Store pack data in Azure Blob Storage for durable, scalable storage
  • Separate compute (replicas/compactors) from durable state to scale independently

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