Release: Amazon EC2 on 2010-02-22

Release Notes>Amazon EC2>Release: Amazon EC2 on 2010 02 22
This release introduces the new High-Memory Extra Large instance type, and support for Reserved Instances with Windows.


Submitted By: cheriaws
Release Date: February 22, 2010 12:00 AM GMT
Latest Version: 2009-11-30
Latest WSDL:
Created On: February 22, 2010 4:35 PM GMT
Last Updated: February 23, 2010 5:08 AM GMT

New Features

High-Memory Extra Large Instances Amazon EC2 now supports a new instance type: High-Memory Extra Large (m2.xlarge). For more information about this instance type and how it compares to the other types, go to the Amazon EC2 Instance Types page.
Reserved Instances with Windows Amazon EC2 now supports Reserved Instances with Windows. For more information about Reserved Instances, go to the Amazon EC2 Reserved Instances page.

Known Issues

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 that are backed by Amazon S3 take longer to launch than Linux/UNIX instances due to larger AMI sizes and multiple reboots.
Windows AMI sizes Installing software on Windows AMIs that are backed by Amazon S3 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
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