SQL to NoSQL: Modeling data in Amazon DynamoDB

This article provides a comprehensive guide to modeling data in Amazon DynamoDB when migrating from SQL databases, focusing on strategies for effective data design in a social media platform example.

• Key steps in DynamoDB data modeling include:
  • Identifying core and supporting entities
  • Deciding between single-table or multi-table design
  • Defining partition and sort keys
  • Modeling entity relationships
• Two primary relationship modeling strategies were explored:
  • Single-item approach (storing all related data in one item)
  • Vertical partitioning (storing related data in adjacent items)
• Crucial considerations include:
• Item size limits (400 KB)
• Access patterns
• Read/write usage metrics

The analysis revealed that the optimal modeling strategy depends on specific use cases, with vertical partitioning often providing more cost-effective solutions for read and write operations.