Amazon EBS – Consider Upgrading io1 Volumes to io2

Amazon Elastic Block Store (EBS) io2 volumes represent a significant improvement over io1 volumes, offering enhanced durability and performance at the same price point. This policy guide helps organizations optimize their EBS volume configurations for better reliability and cost-effectiveness.

Why This Policy Matters

The transition from io1 to io2 volumes provides critical benefits:

Dramatically Improved Durability:

io1 volumes: 99.8% durability

io2 volumes: 99.999% durability (100X improvement)

Enhanced Performance Ratio:

io1: Lower IOPS-to-storage ratio

io2: 500 IOPS per provisioned GB (10X improvement)

Cost and Performance Optimization

Potential Savings Breakdown:

Direct Cost Savings

• No price increase for io2 volumes

• Same cost with significantly better performance

• Potential infrastructure cost reduction of 20-30%

Performance Efficiency

• Reduced need for multiple volumes

• Lower overall storage and compute costs

Improved application responsiveness

Example Savings Scenario:

1TB io1 volume with 5,000 IOPS

Equivalent io2 volume provides:

5,000 IOPS

100X durability improvement

Zero cost increase

Implementation Guide

Infrastructure-as-Code Upgrade Example (Terraform)

Before (io1 volume)

resource "aws_ebs_volume" "example" {
  type = "io1"
  size = 1000
  iops = 5000
}

resource "aws_ebs_volume" "example" {
  type = "io1"
  size = 1000
  iops = 5000
}

resource "aws_ebs_volume" "example" {
  type = "io1"
  size = 1000
  iops = 5000
}

After (io2 volume)

resource "aws_ebs_volume" "example" {
  type = "io2"
  size = 1000
  iops = 5000
}

resource "aws_ebs_volume" "example" {
  type = "io2"
  size = 1000
  iops = 5000
}

resource "aws_ebs_volume" "example" {
  type = "io2"
  size = 1000
  iops = 5000
}

Manual Migration Steps

• Create a snapshot of the existing io1 volume

• Create a new io2 volume from the snapshot

• Detach the old io1 volume

• Attach the new io2 volume

• Verify data integrity and performance

Best Practices

• Incremental Migration: Upgrade volumes in stages

• Performance Testing: Validate application performance post-migration

• Cost Monitoring: Use tools like Infracost to track and optimize ongoing costs

Recommended Tools

• Infracost: Automatically detect and recommend upgrades

• AWS CLI: Facilitate volume migrations

• AWS Cost Explorer: Track potential cost savings

Example Scenarios

High-Performance Database

Scenario: MySQL database with critical I/O requirements

Impact:

100X improved durability

Same cost structure

Enhanced read/write performance

Media Processing Workload

Scenario: Video rendering infrastructure

Impact:

Reduced volume count

Lower overall storage costs

Improved data protection

Considerations and Caveats

Potential Limitations

• Not all workloads benefit equally

• Specific application performance requirements vary

• Minimal gain for low-I/O workloads

Migration Risks

Temporary application downtime during migration

Potential configuration complexities

Requires thorough testing

Frequently Asked Questions (FAQs)

Is there a cost to upgrade from io1 to io2?
No, io2 volumes are priced identically to io1 volumes.

How complex is the migration process?
The migration is straightforward, typically involving snapshot and volume recreation.

Can I use Infracost to help with this migration?
Yes, Infracost can detect io1 volumes and recommend io2 upgrades during infrastructure planning.

Are there any performance differences between io1 and io2?
io2 offers a higher IOPS-to-storage ratio and significantly improved durability.

What workloads benefit most from this upgrade?
High-I/O workloads like databases, media processing, and critical enterprise applications.