Reach

Reach is an event-sourced actor system for Industry 4.0 manufacturing — a process-separated architecture using the C++ Actor Framework, Apache Kudu for event persistence, and Aeron IPC for sub-microsecond inter-process messaging.

The architecture validates a specific claim: that fault isolation and ultra-low-latency IPC together outperform monolithic integration at manufacturing scale. Phase-3 testing showed that direct integration between the actor framework and the storage layer caused segmentation faults due to thread-local storage conflicts; process separation eliminated the failure mode and added 0.25 µs of round-trip latency, which is irrelevant at the timescales of physical machinery.

Current numbers, reproducible on commodity hardware:

• Aeron round-trip latency: ≈ 0.25 µs
• Recovery throughput: 4,347 entities / second
• 100 equipment recovery: 23 ms total
• Telemetry capacity: 56,000 events / second across 10,000 simulated machines

The name comes from the nautical sense — a stretch of navigable water between two points — and the everyday sense of extending across distance. Both fit: the system extends a coherent event log across machines, processes, and sites without losing the timing guarantees each layer needs.