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Using cost allocation EFS file system tags - Amazon Elastic File System
User-defined cost allocation tags
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Using cost allocation EFS file system tags

To track the storage cost or other criteria for individual projects or groups of projects, label your EFS file systems using cost allocation tags. A cost allocation tag is a key-value pair that you associate with a file system. After you activate cost allocation tags, Amazon uses the tags to organize your resource costs on your cost allocation report.

The cost allocation report lists the Amazon usage for your account by product category and linked account user. The report contains the same line items as the detailed billing report (see Understanding billing and usage reports for Amazon EFS) and additional columns for your tag keys.

Amazon provides two types of cost allocation tags, Amazon-generated tags and user-defined tags. Amazon defines, creates, and applies the Amazon-generated aws:createdBy tag key for you after an Amazon EFS CreateFileSystem event. You define, create, and apply user-defined tags to your file systems.

You must activate both types of tags separately in the Billing and Cost Management console before they can appear in your billing reports. For more information about Amazon-generated tags, see Organizing and tracking costs using Amazon cost allocation tags in the Amazon Billing User Guide.

User-defined cost allocation tags

A user-defined cost allocation tag has the following components:

  • The tag key. The tag key is the name of the tag. For example, in the tag project/Trinity, project is the key. The tag key is a case-sensitive string that can contain 1 to 128 Unicode characters.

  • The tag value. The tag value is a required string. For example, in the tag project/Trinity, Trinity is the value. The tag value is a case-sensitive string that can contain from 0 to 256 Unicode characters.

For more information about user-defined tags, see Using user-defined cost allocation tags in the Amazon Billing User Guide.