Non-ASG Intel to AMD

Opportunity Name:

Non-ASG Intel to AMD

AWS Resource Type:

EC2

Opportunity Description:

EC2 instance types with AMD processors are roughly 10% less expensive than the equivalent Intel instance types.

Criteria for identifying the opportunity:

  • The EC2 instance type has an equivalent AMD based instance type: 
    • c5 - c5a
    • c5d - c5ad
    • c6i - c6a
    • m5 - m5a
    • m5d - m5ad
    • m6i - m6a
    • r5 - r5a
    • r5d - r5ad
    • t3 - t3a
  • The EC2 instance has recent EBS snapshots, or creating new snapshots costs less than the expected cost-savings

 

Potential savings (range in % on annual basis):

Retyping Intel-based instances to AMD will provide about 10% cost savings.

 

What happens when the Fixer is executed?

The fixer stops the EC2 instance and creates/updates snapshots. Then it changes the instance to the equivalent AMD based instance type and restarts the instance.

 

Risks

This Fixer only retypes to equivalent (same family) instance types. This eliminates any risks where new drivers and updates to the OS are required. 


In the unlikely event that the instance won’t start afterwards, the instance type will automatically be reverted to the original type.


All retyping operations require an instance restart. The fixer checks that the instance successfully restarts but cannot check that all custom software and processes successfully restart. Also public non-elastic IPs will change.

 

Is it possible to rollback once CloudFix implements the fixer?

Manual rollback on your AWS account is possible. One-click rollback via CloudFix for this opportunity is currently not available.

 

Can CloudFix implement the fix automatically once I accept the recommendation?

Yes, once you accept the recommendation and schedule the fix, execution is automatic.

Because this fixer will restart your instances, you schedule the fix per instance or group of instances. CloudFix will not automatically act on newly found retyping opportunities.

 

Does this fix require downtime?

Yes. The instance has to be stopped to change the instance type. Stopping the instance, taking snapshots and changing its instance type typically takes around 10 min minutes, but may take longer for large volumes that had no previously existing snapshots. Also, restarting your instance might take a variable amount of time depending on the applications running on your instance and their startup times.

 

Do it yourself (DIY) Instructions:

If you have a CloudFix subscription, CloudFix will execute these automatic cost savings for you. However, if you'd like to do it yourself - please follow these instructions:

Finding cost-saving recommendations with CloudFix is FREE! You'll need a paid subscription only if you'd like CloudFix to execute those recommendations.

 

AWS EC2 Console

Important: As per AWS recommendations, create a backup of your instances before you make any changes.
  • Select an instance that matches the eligibility list.
  • Click on the instance id to open the instance detail view.
  • Click on Instance state -> Stop instance

stop-instance.png

  • Allow some time for the instance to stop
  • Click on Actions -> Images and templates -> Create image

create-image-menu.png

  • Enter the details for the backup image and click Create image

create-image.png

  • Click on Actions -> Instance settings -> Change instance type

change-instance-type-menu.png

  • Select the equivalent AMD based instance type

select-equivalent-instance-type.png

  • Allow for some time for the changes to take effect
  • Click on Instance state -> Start instance

start-instance.png

  • Check in the instance list overview that the Instance state is Running.

check-status.png

 

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