Hybrid Cloud Architecture: Definitions, Types, Characteristics, and Design Goals
The article explains hybrid cloud architecture, defining it as interconnected IT infrastructures across multiple clouds, outlines its various forms—including public‑public, private‑private, public‑private, and public‑traditional IT—compares it with multi‑cloud, and discusses key characteristics such as elasticity, extensibility, security, and the five‑fold design goals for modern cloud deployments.
Hybrid cloud currently lacks a precise definition; according to NIST it can be described as an IT architecture that interconnects multiple clouds.
The article identifies four main hybrid cloud forms:
Public‑cloud to public‑cloud.
Private‑cloud to private‑cloud.
Public‑cloud to private‑cloud.
Public‑cloud to traditional IT.
It distinguishes hybrid cloud from multi‑cloud, noting that hybrid cloud requires dedicated links (e.g., VPN or dedicated lines) for inter‑cloud connectivity, while multi‑cloud relies on cloud‑management platforms and APIs.
Key characteristics of hybrid cloud are discussed:
Elasticity : dynamic scaling across clouds, leveraging public‑cloud resources for peak loads and releasing them during low demand.
Extensibility : unified APIs hide underlying infrastructure differences, enabling rapid integration of third‑party services and cross‑cloud resource management.
Security : increased boundary complexity demands unified security management, leveraging public‑cloud protection services (DDoS mitigation, WAF, etc.) and ensuring data encryption and compliance.
The design goals are summarized as the “five‑connectivity” objectives—data‑center connectivity, network connectivity, data connectivity, application connectivity, and management connectivity—each supported by cloud‑management platforms.
Finally, the article places hybrid cloud within the broader context of new‑infrastructure (“new‑base”) development, arguing that cloud computing is the foundational layer of new infrastructure and that hybrid cloud will become the dominant architecture for future digital economies.
Top Architect
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