Architecting an Industrial-Grade Edge Gateway in Rust: In-Memory O(1) Design

Short summary

An architectural deep-dive into designing an industrial-grade edge gateway in Rust with an O(1) in-memory computing model and zero local disk I/O. The design segregates data and control planes, uses DashMap segmented locks for billing, Wasmtime for sandboxed execution, and a lock-free ring buffer for logging to Kafka. Advanced resilience via mmap/shared memory enables near-instant process recovery with zero data loss.

• •Edge gateway pursues O(1) in-memory model with zero disk I/O, delegating persistence to central infrastructure
• •TLS certs lazy-loaded on SNI miss from distributed KV store, never read from disk
• •Shared memory (mmap) enables crash recovery with zero data loss; only bare-metal power failure wipes counters

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