AWS Certified Data Analytics Specialty 2021 - Hands-On! - Amazon DynamoDB Accelerator (DAX)

The video tutorial introduces DAX, a DynamoDB accelerator that acts as a cache to improve read performance by reducing latency and solving the hotkey problem. It explains the configuration of DAX, including TTL, node setup, and security features like encryption and IAM permissions. The tutorial provides a step-by-step guide to creating and managing a DAX cluster, emphasizing the importance of provisioning and the associated costs. Finally, it concludes with a brief overview of using the SDK for DAX and encourages further exploration.

What is one of the main benefits of using DAX with DynamoDB?

• It eliminates the need for backups.

• It increases the size of the database.

• It provides microsecond latency for read operations.

• It reduces the cost of write operations.

How does DAX help in solving the hotkey problem?

• By reducing the size of the database.

• By distributing writes evenly across nodes.

• By caching frequently accessed items.

• By increasing the number of partitions.

Which security feature is NOT mentioned for DAX?

• Encryption at rest with KMS

• Firewall protection

• IAM permissions

• VPC integration

What is the recommended minimum number of nodes for a DAX cluster in production?

• 2 nodes

• 4 nodes

• 1 node

• 3 nodes

What should you consider before creating a DAX cluster?

• The number of users accessing the database

• The type of database engine used

• The number of tables in DynamoDB

• The cost implications and provisioning requirements