Part 4/13:
At the core of this failure was Google's cloud infrastructure—specifically, its Service Control system. This system is responsible for managing API requests, including authorization, quotas, and policies, distributed regionally across Google's cloud network.
Google’s Service Control software relies on binary components that execute quota and policy checks. These binaries operate on data stores replicated worldwide, ensuring consistent policy enforcement. As part of ongoing development, Google had introduced new features via code updates, which was a normal procedure intended to enhance system capabilities.