4-dynamodb.md

DynamoDB

• NoSQL database service for applications that need millisecond latency at any scale

• Fully managed

• Supports document and key-value data models

• Pay per request pricing

• Balance of cost and performance

• No minimum capacity

• Pay more per request than with provisioned capacity

• Use cases include: Mobile, gaming, web, IoT, ad-tech, new product launches, etc.

• Stored on SSD storage

• Spread across three geographically distinct data centers

• Eventual consistent reads by default

  • Consistency across all copies of data is usually reached within a second
  • Repeating a read after a short time should return updated data
  • Best read performance

• Strongly consistent reads available

  • Returns a result that reflects all writes that received a successful response prior to the read

• DynamoDB Accelerator (DAX)

  • Fully managed, highly available, in-memory caching service for DynamoDB
  • 10x performance improvement
  • Reduces request times from milliseconds to microseconds even under load
  • Developers don't need to manage caching logic
  • Compatible with DynamoDB API calls

• Security

  • Encryption at rest using KMS
  • Site to Site VPN
  • IAM Policies and roles
  • Fine grained access
  • Integrates with CloudWatch and CloudTrail
  • VPC Endpoints