| Issue | Description |
| Query Version of ModifyInstanceAttribute |
The Query API ModifyInstanceAttribute request does not allow the block-device-mappings to be modified and the user-data attribute cannot be modified if it already contains data. |
| Paid AMIs Backed by Amazon EBS |
AMIs backed by Amazon EBS are not currently supported by Amazon DevPay. |
| Windows AMI launch times |
Windows AMIs take longer to launch than Linux/UNIX instances due to larger AMI sizes and multiple reboots. |
| Windows AMI sizes |
Installing software on Windows AMIs can cause them to become large and easily reach the 10 GB limit. Before bundling, check the size of the C:\ volume. |
| Limitation on drive mapping |
There are limitations on devices available for storage attachment. For more information, go to How to Attach the Volume to an Instance in the Amazon Elastic Compute Cloud User Guide. |
| Security group limitation |
AuthorizeSecurityGroupIngress does not allow port ranges for group grants when using the command-line tools or the Query API. This is only supported through the SOAP API. |
| Instance limit |
New users are limited to a maximum of 20 concurrent instances, but many of our customers use hundreds or thousands of instances. If you need a higher limit, go to http://www.amazon.com/gp/html-forms-controller/ec2-request. |
Release: Amazon EC2 on 2010-03-22
