Azure Basic Tier vs Standard Tier VMs


Basic tier (A0-A4) Standard tier
Load Balancing Not supported External and internal load balancing
(Port-level load balancing, not application layer)
Auto-scaling Not available Supports auto-scaling to handle unpredictable peak capacity
IOPS 300 IOPS per disk 500 IOPS per disk
Price Up to 27% lower prices than Standard
Max NICs 2  8

The basic tier sizes are primarily for development workloads and other applications that don't require load balancing, auto-scaling, or memory-intensive virtual machines.

It is possible to switch an existing Standard Virtual Machine to its equivalent Basic tier. Note that this will require a restart to your virtual machine. f you’ve already configured the Azure load balancer or Auto-Scale functionality, you won’t be able to downgrade to one of the Basic VM sizes until the configuration is removed.


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