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The Amazon Web Services announced on Monday that the EC2 service is now open to all developers. Along with this excellent news, the AWS team released “Large” and “Extra Large” AMIs. Previously, all EC2 instances (AMIs) were created equal, giving you 1/2 an Opteron CPU, 1.75GB of memory, and 160GB disk. We now have some choices:

Small Instance (default - what we have now)

• 1.7 GB RAM
• 1 EC2 Compute Unit (1 virtual core with 1 EC2 Compute Unit)
• 160 GB storage (150 GB plus 10 GB root partition)
• 32-bit platform
• $0.10 per instance hour

Large Instance (new)

• 7.5 GB RAM
• 4 EC2 Compute Units (2 virtual cores with 2 EC2 Compute Units each)
• 850 GB storage (2 x 420 GB plus 10 GB root partition)
• 64-bit platform
• $0.40 per instance hour

Extra Large Instance (new)

• 15 GB RAM
• 8 EC2 Compute Units (4 virtual cores with 2 EC2 Compute Units each)
• 1,690 GB instance storage (4 x 420 GB plus 10 GB root partition)
• 64-bit platform
• $0.80 per instance hour

Atlantic Dominion Solutions is leading the way with Ruby on Rails deployments on Amazon Web Services including EC2, S3, and SQS. ADS partner RightScale also announced on Wednesday that they are supporting the new instance types. For more information on scaling Ruby on Rails applications using Amazon Web Services, contact Robert Dempsey at ADS, and in the meantime, read our articles on the Amazon Web Services Developer Connection site:

Intro to AWS for Ruby Developers

Economical Use of Amazon S3 with Ruby on Rails

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