Flavor explanation

Overview

This page explains the flavor naming convention stepping stone AG uses.

Naming convention

The flavor name contains three vital pieces of information:

- The host aggregate
- The number of CPUs
- The amount of Memory (in GiB)

Naming convention - CPU & Memory

• The number of CPUs is prefixed with the character c and padded with 0s to a total of 3 decimal digits.
• The amount of Memory is expressed in GiB. It is prefixed with the character m and padded with 0s to a total of 3 decimal digits.

Here is an example for a flavor with one CPU and 2 GiB of RAM in the "Standard Düdingen North" host aggregate:

  Standard Düdingen North c002m0004

  1. CPU
  2. Memory

Naming convention - Host aggregates

These host aggregates exist:

- Standard Düdingen
- Developer Düdingen
- Enterprise Düdingen
- Standard Windows Düdingen
- Standard Düdingen South
- Standard Düdingen North

Naming convention - Sceduling properties

We have defined a custom scheduling property called vm_quality_class. It represents the quality classes we offer: "developer"(2), "standard"(1) and "enterprise"(3). This property is added to host aggregates and flavors. When scheduling VMs, the AggregateInstanceExtraSpecsFilter schedule filter will match VMs to VM Nodes accordingly.