Modernizing Cloud Admission Control: Off the Global Read Path
Why synchronous global reads turn cloud admission control into a fleet-wide failure domain, and how signed snapshots and cell-local ledgers fix it.
Admission control is a critical process for managing resource creation in cloud computing environments. It should execute in real-time to prevent issues from cascading globally. A monolithic admission service can become a single point of failure, affecting the availability of the entire system. The paper proposes a new admission control process that separates policy evaluation from resource allocation, allowing each entity to operate independently without being aware of the broader system state.
This approach enables autonomous functioning and reduces the impact of failures. The paper also covers fail-stable patterns, latency analysis, system state management, and a gradual migration strategy from the existing architecture to the new one.
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