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The bridge to agent-scale Git infrastructure
GitHub is migrating nearly all repositories to Azure, utilizing per-reference quorums to manage exponential growth in Git traffic.
What: GitHub is scaling its infrastructure to handle increasing Git activity by moving repositories to Azure and decoupling read scaling through object storage implementations.
Why it matters: The shift highlights how massive scale forces cloud providers to move away from monolithic storage toward distributed, reference-based quorum architectures to maintain performance.
Decoder
- Per-reference quorum: A consistency mechanism in distributed systems that requires a specific number of nodes to agree on the state of an individual Git branch or tag reference before operations are committed.
Original article
Git traffic grew exponentially over the past year. During that time, GitHub started moving almost all of its repositories to Azure. This post discusses how per-reference quorums will bring over the rest, and how object storage lets reads scale independently.
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