Implement event-driven architectures with Amazon DynamoDB – Part 2

This article discusses implementing event-driven architectures with Amazon DynamoDB using global secondary indexes (GSIs) for precise Time to Live (TTL) management. The solution provides a near real-time approach to data expiration with the following key features:

• Uses sharded GSIs to distribute write load across multiple partitions
• Implements a Lambda function to query and delete expired items
• Uses EventBridge Scheduler to trigger the Lambda function at regular intervals
• Provides more precise data eviction compared to native DynamoDB TTL
• Offers cost-optimized indexing with KEYS_ONLY projection and sparse indexing

The solution is particularly useful for high-throughput applications requiring immediate data removal, with the ability to customize shard count and deletion intervals based on specific requirements.