Release: Amazon EC2 on 2009-12-02

Release Notes>Amazon EC2>Release: Amazon EC2 on 2009 12 02
This release introduces AMIs backed by Amazon EBS.


Submitted By: Bruce@AWS
Release Date: December 2, 2009 12:00 AM GMT
Latest Version: 2009-10-31
Latest WSDL:
Created On: December 2, 2009 9:32 PM GMT
Last Updated: December 3, 2009 9:59 AM GMT

New Features

Elastic AMIs

Amazon EC2 AMIs can now be backed by Amazon EBS, which are easier to create than AMIs that use instance stores as root devices, launch faster, support sizes up to 1 TiB, and use persistent storage. For more information about AMIs, go to the Amazon Elastic Compute Cloud Developer Guide or Amazon Elastic Compute Cloud User Guide.

Amazon EC2 in Northern California

Amazon EC2 is now available in Northern California. For more information, go to the Amazon Elastic Compute Cloud Detail 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 Reserved Instances Reserved Instances are not currently available for Windows.
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 is currently no support for volume attachment to devices beyond /dev/sdp on instances running Linux/UNIX and xvdp on instances running Windows.
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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