TLDR Tech / Data
Building Prometheus: How Backend Aggregation Enables Gigawatt-Scale AI Clusters
Meta's Prometheus AI cluster will deliver 1 GW of capacity by interconnecting tens of thousands of GPUs across numerous data centers, enabled by the Backend Aggregation (BAG) network. BAG employs modular Jericho3 ASIC-powered chassis, petabit-level inter-BAG bandwidth (up to 48 Pbps per region pair), and advanced Ethernet-based topologies with eBGP routing and MACsec security. Precise oversubscription management and distributed architecture ensure high-performance, resilient networking.
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