Design Decision: Scalability Considerations

Which Azure instance series are best for hosting my Citrix Virtual Apps and Desktops workload?

• Select the D/DS series instances when your applications consume a fair amount of memory. The D/DS series have a higher memory-to-CPU ratio.

• Select the F/FS series instances when you need excellent CPU response times and do not require a significant amount of memory. The F/FS series have faster processors but lower memory-to-CPU ratios than the D/DS series instance family.

• The most cost-effective instance type is the F/FS series with 8 or 16 vCPUs followed by the D/DS series with 4 vCPUs.

• Choose instance types with fewer vCPUs when you want to:
  • affect fewer users during maintenance windows or unexpected server performance issues
  • scale down quicker to take advantage of cost savings with Autoscale
• Choose instance types with more vCPUs when you want to:
  • Reduce the API calls to Azure infrastructure for operations
  • Manage fewer machines

Links to Other Resources

The scalability and economics of delivering Citrix DaaS on Azure