Azure Cloud Architecture Models

  • Three deployment methods of cloud computing: Public vs Private vs Hybrid.
  • The model you choose for cloud deployment depends on your budget, security, scalability, and maintenance needs.

Public Cloud

  • Focus on maintaining your applications without having to worry about purchasing, managing, or maintaining the hardware on which it runs.
  • You can use multiple public cloud providers of varying scale.



High scalability/agility

Specific security requirements

Pay-as-you-go pricing

Government policies, industry standards, or legal requirements

You are not responsible for the updates and maintenance of the hardware.

You don’t own the hardware or services and you also can’t manage them as you may want to.

The required technical knowledge is minimal.

Maintaining a legacy application might be hard to meet


Private Cloud

  • A dedicated on-premises datacenter configured to be a cloud environment that provides users in your organization with self-service access to compute resources.
  • You are responsible for the purchase and maintenance of the hardware and software services.
  • You can use a private cloud when an organization has data that cannot be put in the public cloud, perhaps for legal reasons.



Any scenario or legacy application configuration is supported.

CapEx involved – principal cost is the procurement of the equipment.

You have control (and responsibility) over security

To scale, you must buy, install, and set up new hardware

Compliance, or security requirements in your organization

Private clouds require IT skills and expertise


Hybrid Cloud

  • Data and applications can move between private and public clouds.
  • When there is a spike in demand in your private cloud, you can “burst through” to the public cloud for additional computing resources.



Maintain a private infrastructure for sensitive assets.

More expensive than selecting one deployment model since it involves some CapEx cost upfront

Take advantage of the resources in the public cloud when needed.

It can be more complicated to set up and manage

With the ability to scale to the public cloud, you pay for extra computing power only when needed.

Allows you to use your own equipment to meet the security and compliance requirements in your organization.



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