SAA-C03 Q115 · Storage

Question

A company has stored millions of objects across multiple prefixes in an Amazon S3 bucket by using the Amazon S3 Glacier Deep Archive storage class. The company needs to delete all data older than 3 years except for a subset of data that must be retained. The company has identified the data that must be retained and wants to implement a serverless solution. Which solution will meet these requirements?

Accepted Answer

This answer satisfies every requirement:

1. **Millions of objects across multiple prefixes**: S3 Inventory automatically generates a complete inventory report (CSV, ORC, or Parquet) of all objects in the bucket, handling millions of objects efficiently without needing to call ListObjects API repeatedly.

2. **Delete objects older than 3 years except retained subset**: An AWS Lambda function provides the custom logic layer — it can filter objects by age (using LastModifiedDate from inventory) and cross-reference against the known retention list to skip objects that must be kept.

3. **Serverless**: Both AWS Lambda and S3 Batch Operations are fully serverless. No EC2 instances, no infrastructure to manage.

4. **S3 Batch Operations**: This is the key service for operating on objects at mass

📖 Explanation

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📘 Key Concepts

🏗️ Architecture

⚙️ Operations

💰 Cost

🔒 Security

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