What is DynamoDB

• Amazon DynamoDB is a fast and flexible NoSQL database service for all applicatiosn that need consistent, single-digit millisecond latency at any scale.
• It is a fully managed database and supports both document and key value data models
• Its flexible data model and reliable performance make it a great for for many web applications.

The basics of DynamoDB are as follows

• Stored on SSD storage
• Spread across 3 grographically distincy data centres
• Eventual Consistent Reads (Default)
• Strong Consistent Reads

Eventual Consistent Reads

• Consistenct across all copies of data is usally reached within a second. Repeating read after a short time should return the updated data (Best Read Performance)

Strongly Consistent Reads

• Before one second rule
• A strongly consistent read returns a result that reflects all writes that receivd a successful response prior to the read