Building Git infrastructure for agent-scale development
10 hours ago
- GitHub is rebuilding its Git infrastructure to support agentic software development, which involves high concurrency and frequency of changes.
- The current architecture ties durability to scale, where adding read replicas slows down writes, creating a bottleneck for busy repositories.
- The new architecture decouples durability from scale, allowing independent scaling of reads and writes, achieving up to 35 times higher write throughput in benchmarks.
- Git activity on GitHub doubled from 218.2 billion events per month (Sept 2025) to 473.3 billion (Aug 2026), with 7.38 billion commits in Sept 2026 alone.
- Design principles include minimizing coupling to improve write throughput, separating storage from Git request handling, and preserving critical controls like branch protections and audit logs.
- The rebuild is done without downtime, ensuring existing workflows remain unchanged while scaling for the most demanding workloads.