Gartner Research

Calculating Per-VM Costs in Private Clouds

Published: 29 January 2013

ID: G00239847

Analyst(s): Nik Simpson

Summary

Many organizations are interested in implementing chargeback or showback for virtual machines that are hosted in private clouds. The goal is to make business units aware of the cost of services they consume and provide a useful comparison to public cloud costs.

Table Of Contents

Summary of Findings

Guidance Context

  • Problem Statement
  • Guidance Applicability
  • Related Guidance

The Gartner Approach

The Guidance Framework

  • Prework
  • Private Cloud Configuration
  • Chargeback Model
    • Constants
    • Private Cloud Software Stack
    • Data Center Space
    • Servers
    • Storage
    • Networking
    • Guest Operating Systems
    • Sample VM Catalog Configurations
  • Follow-Up

Risks and Pitfalls

  • Risk: Inadequate Cost Data
  • Risk: Difficulty in Apportioning Shared Costs
  • Risk: Variable Costs
  • Pitfall: Expecting Perfect Accuracy
  • Pitfall: Failure to Maintain the Model

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