To use the AWS CLI and SDKs with longer IDs, you must upgrade to the following versions:

- PHPv2: Must upgrade to v2.8.27+
- PHPv3: Must upgrade to v3.15.0+
- CLI: Must upgrade to v1.10.2+
- Boto3: Must upgrade to v1.2.1+
- Botocore: Must upgrade to v1.3.24+

The following SDKs are fully compatible with longer IDs and do not need to be upgraded: PHP v1, Boto v1, Boto v2, Ruby v1, Ruby v2, JavaScript, Java, .NET, AWS Tools for Windows PowerShell, and Go.

For all tools, if you wish to use the new ModifyIdFormat and DescribeIdFormat APIs, you will need to update your tools to receive the new APIs starting in January 2016.
EC2 instance and reservation IDs, and volume and snapshot IDs for EBS and Storage Gateway, are changing to a longer format. The transition to longer instance and reservation IDs started in January 2016 and will last through early December 2016, and the transition to longer volume and snapshot IDs started in April 2016 and will last through early December 2016. During this time, you can choose which ID format these resources are assigned, and you can update your management tools and scripts to add support for the longer format. After early December 2016, all newly created instances, reservations, volumes, and snapshots will be required to use the longer ID format.

The new format will only apply to newly created resources; your existing resources won’t be affected. Visit the AWS Blog for a step-by-step overview of how to opt in to longer IDs.
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