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Meta’s Software System Blueprint: Unveiling the Architecture of Social Graphs, Identity, and RTB (3)
Explore how Facebook transformed a simple network into a multidimensional hypergraph — leveraging breakthrough data structures, dynamic sharding, and layered caching to power billions of interactions and redefine system architecture.
Disclosure: I use GPT search to collection facts. The entire article is drafted by me.
Introduction
As of 2025, Meta (formerly Facebook) serves over 2 billion daily active users, making its social graph the largest and most complex data structure ever operated at scale. This article dives deep into the revolutionary engineering decisions that enable this massive system to deliver sub-millisecond response times while processing trillions of edges with exceptional reliability.
