AWS Outposts: Dispersing the Last Cloud of Private Cloud Skepticism

Since Amazon announced AWS in 2006, the industry has debated whether private cloud is a false concept destined to be eclipsed by public cloud. Critics like AWS CTO Werner Vogels have called private cloud a "false cloud" designed to sell more hardware.

What a world ruled only by public cloud would look like

If a few public‑cloud providers monopolised all IT infrastructure, hardware vendors such as Intel, Dell, HP, and Cisco would lose bargaining power or be absorbed. Software giants like Microsoft and Oracle would be forced to replace their products with the cloud provider’s own OS, databases, and PaaS offerings.

Outposts lacks the sexy SLA of public cloud

In 2018 AWS introduced Outposts, a hybrid‑cloud appliance that runs AWS services (EC2, EBS, later RDS) in a customer’s data centre using Nitro‑based hardware. While it offers VMWare‑compatible and AWS‑native modes, it cannot provide the minute‑level SLA (e.g., 99.99% uptime) that pure public cloud guarantees, because many failure domains lie outside AWS control.

Outposts as AWS’s compromise with the physical world

Outposts reflects a compromise: customers want the same functionality as the public cloud on‑premises, but the realities of heterogeneous IT, local compute/storage needs, and unreliable networks make a pure public‑cloud model impractical for many industries.

Heterogeneous IT systems—such as sensor‑rich steel plants or remote manufacturing sites—cannot rely on high‑latency, low‑bandwidth links to distant data centres. Localising compute and storage, as Outposts does, mitigates network constraints.

VMWare partnership makes Outposts viable

AWS chose to partner with VMWare rather than rewrite its code for on‑premises deployment. VMWare contributes the control plane and many enterprise‑grade features, allowing AWS to focus on delivering its core services while leveraging VMWare’s global sales network.

Comparison with Azure Stack

Microsoft’s Azure Stack follows a different path, adapting the public‑cloud codebase for hybrid use, which can lead to conflicts between the public‑cloud and hybrid teams and potentially slow innovation.

The future of public cloud

Ultimately, the article argues that public cloud will either dominate all IT infrastructure or become obsolete, depending on breakthroughs in networking and computing physics. Until such breakthroughs occur, hybrid solutions like Outposts will remain necessary.