Wed. Mar 17th, 2021
Cost-of-Hybrid-Cloud
There’s no single formula for calculating your hybrid cloud TCO, but here are all the basic components that should go into that calculation.

Cost of Hybrid Cloud- Managing cloud costs is hard enough when you use a straightforward public cloud architecture. It gets even harder when you move to a hybrid environment that integrates public cloud services with private infrastructure. And don’t forget to add data center colocation to the mix.

With that reality in mind, here’s a guide to calculating total cost of ownership (TCO) for hybrid cloud architectures that run inside a colocation data center.

Hybrid Cloud Software Pricing

The most obvious expense associated with a colocated hybrid cloud is the cost of the software that you use to build and manage your cloud.

For many organizations today, that software will come in the form of a platform like AWS Outposts, Azure Stack, or Google Anthos, which make it possible to run public cloud services and management tools on private infrastructure.

At a basic level, each of these services uses the same pricing structure. The vendors charge based on the number of virtual CPUs (vCPUs) that customers run within their hybrid environment. Outposts is somewhat different in that it is priced based on compute instance types, but this is more or less a proxy for vCPUs.

If you use Anthos and Outposts, you can save some money by paying upfront or committing to a monthly subscription. Azure Stack pricing includes only a pay-as-you-go option.

Public Cloud Egress, API, and Storage Fees

A less obvious cost associated with hybrid cloud platforms like those described above are the extra fees you’ll pay for interactions between your private infrastructure and the public cloud.

Those fees include things like data egress charges that public cloud vendors assess when you move data from their clouds into your own storage media. They generally apply even if you are using an environment based on a platform like Azure Stack or Outposts. API calls to public cloud storage services usually incur a fee, too.

On top of this, some hybrid cloud services charge separate fees even for storage that you host yourself. Azure charges fees for managing your disks within a hybrid cloud, for example.

It’s easy to overlook the costs of things like data egress and API fees in the public cloud. It may be even easier in hybrid environments, where you might assume that these fees are built into the basic cost of the hybrid cloud software that you use. Generally, they’re not.

Server Costs

The cost of the servers that you use to host your hybrid cloud is another significant factor in your hybrid cloud TCO.

If you use Azure Stack, Anthos, or most other hybrid cloud platforms (like Eucalyptus), you’ll need to supply your own servers. The cost of doing so with Azure Stack is likely to be higher than with other platforms, because Azure Stack works only with certified hardware. That means users may not be able to use servers they already own to build a hybrid cloud based on Azure Stack. It also means they will have fewer purchasing options. Anthos and Eucalyptus aren’t subject to these restrictions; they work with any type of modern server.

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Article Credit: DCK

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