Level 2 · Systems
Key-value at any scale
DynamoDB is fast and effectively unlimited, provided every query you will ever run is known before you design the table. Get the key schema wrong and the fix is a migration, not an index.
Chapters
- How DynamoDB keys locate your dataYour database key schema is your primary query interface, and choosing the wrong partition key leads to hot partitions and serverless scalability limits.
- Why a DynamoDB scan will destroy your budgetScans read entire tables and consume massive capacity, whereas indexes provide efficient and cost-effective access paths to your data.