Azure Classroom Series – 07/Aug/2020

Azure Virtual machine states & lifecycle

• Power states:

  • Starting: Not billed
  • Running: Billed
  • Stopping: Billed
  • Stopped: Billed
  • Deallocating: Not billed
  • Deallocated: Not billed

• The above mentioned billing includes only vm instance charges, your Disks & Network (if any) costs will still continue

• Provisioning States:

  • Create: VM Creation
  • Update: updates the model for existing VM
  • Delete: VM Deletion
  • Deallocate:

Azure VM Purchasing Options

• Normal (On-demand/Pay as you go):

  • No long term commitment
  • VMs are charged for hourly usage (minimum unit is 1 hour)

• Reserved Instances

  • Here we get into commitment with Azure for using a VM for a long term. Azure will offer us reservation discounts
  • What can i change in my reservation after purchase?
    • Update reservation scope
    • Ownership
    • Instance size flexibility
  • What i cannot change
    • An existing reservations region
    • SKU
    • Quantity
    • Duration
  • At any time you can cancel, exchange or refund reservations with certain limitations.
  • How can i purchase Reserved VM Instance:

• SpotVMs:

  • Using SPOT vms allows you to take advantage of unused capacity in Azure at very less prices.
  • At any point in time when Azure needs the capacity back, the Azure infra will evict SPOT vms
  • SPOT Vms don’t have any SLA
  • Azure SPOT VMs cannot be used for B-series and Promo versions

• Note: Use azure pricing calculator from here