ARC 5Own Runtime OperationsChapters 19–22
Arc 5 Recap — Turn Operating Responsibilities into Contracts (Chapters 19–22)
Observability, security, lifecycle, and capacity together form DSM's operating responsibility and directly affect fault detection, isolation, and recovery.
Four operating contracts
| Contract | Useful question | Dangerous substitute |
|---|---|---|
| Observability | Which identity/locator/origin/reason differs? | "Sync looks wrong; restart it." |
| Security | Which admission/authentication/encryption/replay/abuse gate rejected? | "Security is enabled." |
| Lifecycle | Which state accepts traffic; when does registry freeze and close? | "Spring Context is up." |
| Capacity | Which fixture, environment, and parameters support this trend? | "The laptop produced a large number." |
How this arc realizes DSM's value
Shared diagnostics, metrics, traces, security gates, and lifecycle reduce repeated platform work across services. Comparable benchmarks identify hot-path regressions. Each target environment still owns alert thresholds, key custody, traffic drain, and production capacity.
A pre-release path
- Check RUNNING state, collection registration, and readiness.
- Verify that diagnostics, metrics, and traces can locate membership/delta/repair/consumer differences.
- Validate token, signature, encryption policy, nonce, abuse limit, and audit outcomes.
- Rehearse readiness removal, drain, Runtime close, and incomplete-action records.
- Run the target microbenchmark under a pinned revision/environment, retain JSON, and keep smoke separate from SLA.
Still unproven
- Observation backend, thresholds, and on-call process work during a real incident.
- Key custody, production rotation, and audit retention satisfy organizational requirements.
- Deployment automation drains real traffic and recovers from forced termination.
- Microbenchmarks represent production networking, peak repair, and business workload.
These gaps become inputs to the Arc 6 E4 lab and final release decision.
Next
Arc 6 adds independent-process/real-port evidence with a Redis-shaped black box, then addresses Federation, alternatives, and the capstone.