DynamoDB Advanced Features
Advanced Features
- DynamoDB Streams
- Changes in DynamoDB (Create, Update, Delete) can end up in a DynamoDB stream
- This stream can be read by AWS Lambda and we can then do:
- React to changes in real time (welcome email to new users)
- Analytics
- Create derivative tables / views
- Insert into ElasticSearch
- Clould implement cross region replication using Streams
- Stream has 24 of data retention
- [[Transactions]]
- All or nothing type of operations
- Coordinated insert, update, delete across multiple tables
- Include up to 10 unique items or up to 4MB of data
- On demand
- No capacity planning needed ([[Write Capacity Unit]]/[[Read Capacity Unit]]) - scales automatically
- 2.5x more expensive than provisioned capacity (use with care)
- Helpful when spikes are un-predictable or the application has very low throughput
- Security
- VPC endpoint available to access DynamoDB without internet
- Access fully controlled by IAM
- Encryption at rest using AWS KMS (Key Management Service)
- Encryption in transit using [[SSL]] / [[TLS]]
- Backup and Restore feature available
- Point in time restore like AWS RDS
- No performance impact
- [[Global Tables]]
- [[Multi region]], fully replication, high performance
- [[Amazon DMS]] can be used to migrate to DynamoDB (from [[MongoDB]], [[Oracle]], [[MySQL]], AWS S3 etc ...)
- You can launch a [[local DynamoDB]] on your computer for development purposes