DynamoDB is fast and flexible NoSQL DB. It can be used for all application that needs consistent, single-digit millisecond latency at any scale. It is fully managed database. And supports both document and key-value data model.
Stored in SSD storage.
Spread across three geographically distinct data centers.
Eventual Consistent Read (Default).
Consistency across all copies of the data is usually reached within 1 second. Repeating a read after a short time should return an updated data.
Strongly consistent Read.
Returns a result that reflects all writes that received successful response prior the read.
DynamoDB pricing
Provisioned Throughput capacity.
Write Throughput $0.0065 per hour for every 10 units.
Read Throughput $0.0065 per hour for every 50 units.