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Use UUIDv7 in DynamoDB to save money and improve performance

· One min read
Javid
Javid
Creator & Software Engineer

Build your app with the mindset of AWS Well-Architected Framework

Introduction​

Don't forget to use UUIDv7. As of May 2024, it's standardized under RFC9562. It's time to start using it in your database designs.

UUIDv7 brings time-ordering to your IDs, which introduces time-ordering to your IDs, offering significant advantages and cost savings, particularly for DynamoDB users.

Why UUIDv7?​

UUIDv7 is a time-ordered UUID that combines the best of both worlds. The uniqueness of UUIDs and the time-ordering capabilities of timestamps. Unlike traditional UUIDs (v4), which are completely random, UUIDv7 embeds a timestamp in its first 48 bits, making it sortable by creation time.

Example​

For example, you have a data model about a company and its employees.

PK: Organization#1
SK: Employee#<uuidv7>

Now you can:

  • Sort in ascending or descending order
  • Filter data within specific time ranges
  • Query employees after or before certain dates

Conclusion​

UUIDv7 is a game-changer for DynamoDB users. By leveraging its time-ordering capabilities, you can design more efficient access patterns and save costs by reducing the need for additional GSIs. Start using UUIDv7 in your database designs today to take advantage of these benefits.