ModelRefs / Hybrid Private-Cloud Stack — Architecture Pattern
Hybrid Private-Cloud Stack — Architecture Pattern
Sensitive data stays in VPC; non-sensitive workloads burst to managed cloud LLMs through a gateway. Unified observability spans both.
Overview
A dual-runtime architecture: a private LLM serves sensitive data inside a customer VPC; a gateway routes non-sensitive traffic to managed cloud LLMs. Unified observability spans both.
When to use it: You need to satisfy data-residency or compliance while keeping cost-effective burst capacity.
Pattern details
| Pattern class | hybrid |
|---|---|
| Difficulty | advanced |
| Topology | hybrid |
| Also known as | private llm gateway, vpc llm |
| Last reviewed | 2026-06-07 |
Known failure modes
- Misroute — Sensitive request routed to cloud. Mitigation: Policy-engine veto + audit log.
- Split-brain evals — Two runtimes drift in quality. Mitigation: Single eval harness covering both.
When not to use it
- Letting the classifier be advisory only.
Continue your research
Use these connected ModelRefs sections to compare alternatives, inspect implementation paths, and review the evidence and governance boundaries relevant to Hybrid Private-Cloud Stack — Architecture Pattern.
Frequently asked questions
When should I adopt the Hybrid Private-Cloud Stack?
You need to satisfy data-residency or compliance while keeping cost-effective burst capacity.
What are common failure modes of Hybrid Private-Cloud Stack?
Misroute • Split-brain evals
Is Hybrid Private-Cloud Stack production-ready?
Yes when paired with the safety controls and observability hooks documented on the pattern page.