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The starting point for most is the core count of your cloud. By applying some ratios, you can gather information about the number of virtual machines (VMs) you expect to run ((overcommit fraction × cores) / virtual cores per instance), how much storage is required (flavor disk size × number of instances). You can use these ratios to determine how much additional infrastructure you need to support your cloud.


Cover of OpenStack Operations Guide
  • Scaling
  • from OpenStack Operations Guide
  • by Joe Topjian, Everett Toews, Jonathan Proulx, Lorin Hochstein, Anne Gentle, Diane Fleming, Tom Fifield
  • Publisher: O'Reilly Media, Inc.
  • Released: May 2014


Core Count to VM instances Math