The eTag Fuse Platform is designed for flexibility, scalability, and governed interoperability at runtime. Its architecture is based on modular runtimes, which register and discover each other dynamically across environments.
The two primary runtime types are the Hub and the Engine — each optimized for specific operational roles.
Hub runtimes serve as the web-based user interaction portals within the Fuse ecosystem. They are optimized for:
Typical Use Cases:
While Hubs can execute workflows, they are best suited for lighter, interactive, user-triggered processes — not for sustained heavy background execution.
Engine runtimes are designed for heavy operational execution and unattended orchestration. They specialize in:
Typical Use Cases:
Engines are ideal for scalable, durable, service-level orchestration where user interaction is not required.
All Fuse runtimes — Hub or Engine — are designed to:
This dynamic discovery mechanism enables seamless scaling across:
Runtimes collaborate based on domain scopes, runtime roles, and policy configurations, ensuring secure, governed execution even across distributed nodes.
| Scenario | Recommended Runtime Layout |
|---|---|
| Small internal deployment | 1 Hub + 1 Engine (co-located or separated) |
| Enterprise user portal | 1+ Hub runtimes with load balancing |
| High-volume workflow execution | Multiple Engine runtimes (horizontally scaled) |
| Hybrid on-premises/cloud execution | Hubs on-premises + Engines in cloud or vice versa |
| Multi-tenant edge processing | Distributed Engines with lightweight Hub instances |
Fuse enables organizations to scale runtimes independently based on user load, workflow complexity, operational SLAs, and compliance requirements.
All runtime communication is:
Runtimes can be segmented by:
Fuse supports advanced deployment models, including:
These topologies enable Fuse to operate flexibly across modern enterprise environments without compromising security, governance, or performance.
Related:
Learn more about Deployment Models.
Understand the difference between Infrastructure and Runtime Interoperability.
Explore how Fuse augments cloud platforms.
Next: Regulated Deployments — Discover how Fuse supports highly secure, compliance-driven deployment scenarios.