Azure Virtual Machines – Consider Upgrading Standard A-Series Machines to Av2

Azure’s standard A series virtual machines are older generation instances that can be significantly less cost-effective compared to the newer Av2 series. Upgrading to Av2 machines offers improved price performance, better processor technology, and potential cost savings of up to 20% while maintaining or improving computational capabilities.

Why Upgrading Matters

The Av2 series provides substantial benefits over the original A series:

• Performance Improvement: Newer Intel Xeon processors

• Cost Efficiency: Lower cost per compute unit

• Resource Optimization: Better memory and storage configurations

• Modern Infrastructure: Access to more recent hardware technologies

• Cost Savings and Performance Analysis

Comparative Example

Instance TypeCoresRAMTemporary StorageMonthly Cost (East US)Performance Gain A3 (Standard)47 GB285 GB$175BaselineA4 v2 (Upgraded)48 GB40 GB$13920% Cost Reduction

Potential Annual Savings

For organizations running multiple instances, the cost savings can be significant:

• Small Environment (10 instances): Up to $360/month

• Medium Environment (50 instances): Up to $1,800/month

• Large Environment (100+ instances): Potential savings exceeding $3,600/month

Implementation Guide

Infrastructure-as-Code Upgrade Example (Terraform)

Before (Standard A Series)

resource "azurerm_virtual_machine" "example" {
  vm_size = "Standard_A3"
  # other configurations
}

resource "azurerm_virtual_machine" "example" {
  vm_size = "Standard_A3"
  # other configurations
}

resource "azurerm_virtual_machine" "example" {
  vm_size = "Standard_A3"
  # other configurations
}

After (Av2 Series Upgrade)

resource "azurerm_virtual_machine" "example" {
  vm_size = "Standard_A4_v2"
  # other configurations
}

resource "azurerm_virtual_machine" "example" {
  vm_size = "Standard_A4_v2"
  # other configurations
}

resource "azurerm_virtual_machine" "example" {
  vm_size = "Standard_A4_v2"
  # other configurations
}

Manual Upgrade Steps

• Assess current virtual machine configurations

• Identify compatible Av2 series replacements

• Plan migration during maintenance windows

• Create new Av2 instances

Migrate workloads and data

Decommission old A series instances

Best Practices

• Incremental Migration: Upgrade in stages

• Compatibility Check: Verify application support

• Performance Testing: Validate workload performance

• Cost Monitoring: Track actual savings

Implementation Tools

• Infracost: Automatically detect and recommend A series to Av2 upgrades

• Azure Cost Management: Validate cost optimization

• Azure Advisor: Provides upgrade recommendations

Considerations and Caveats

Potential Limitations

Storage Differences: Reduced temporary storage in Av2

Legacy Application Compatibility

Migration Complexity

Specific Workload Requirements

When to Avoid Upgrade

Highly Specialized Workloads

Strict Compliance Requirements

Limited Budget for Migration

Example Scenarios

Web Hosting Environment

Current Setup: 20 Standard A3 instances

Upgrade Potential: Save $3,600/month

Performance Impact: Improved processor, slightly more RAM

Development Infrastructure

• Use Case: Continuous Integration/Continuous Deployment (CI/CD)

• Benefits: Faster builds, lower infrastructure costs

Frequently Asked Questions (FAQs)

How quickly can I realize cost savings?
Immediately upon migration, with potential first-month savings of 20%.

Are there any data migration risks?
Minimal risks if proper planning and testing are conducted.

Do Av2 instances support the same operating systems?
Yes, Av2 supports similar operating system configurations as standard A series.

How does Infracost help with this upgrade process?
Infracost provides automated detection, cost estimation, and upgrade recommendations directly in your infrastructure-as-code workflow.

What if my specific workload has unique requirements?
Conduct thorough testing and consult Azure documentation for specific compatibility details.