21.4 - Databases in AWS - DynamoDB

DynamoDB has 2 backup options

- Automated Backups - On Demand backups

Which exclusive DynamoDB feature is an in-memory cache that can improve your performance up to 10x? - ElastiCache - Edge Locations - DynamoDB Accelerator - Snowball Edge

- DynamoDB Accelerator

DynamoDB has 2 capacity modes:

- Provisioned Capacity - On-Demand

What type of performance improvement will DynamoDB Accelerator (DAX) give us

10X

If exam asks about caching technology for DynamoDB, we should think

DAX

What technology gives DynamoDB a Read Cache out-of-the-box?

DAX

IF the exam asks about microsecond read latency we should be thinking about

DAX Cluster

DB - Fully Managed Highly available with replication across 3 AZs - NoSQL database - not a relational database - Scales to massive workloads, distributed "serverless" database - Millions of requests per second, trillions of rows, 100s of TB of storage - Fast and consistent in performance - Single-digit millisecond latency - low latency retrieval - Integrated with IAM - Low cost and auto scaling capabilities - Standard and Infrequent Access (IA) Table Class

DynamoDB

If exam asks about key/value DB, we should think

DynamoDB

If the exam talks about rapidly evolving schemas, we should be thinking ______

DynamoDB

Which Give us a TTL feature on our rows: ElastiCache or DynamoDB

DynamoDB

What is DAX

DynamoDB Accelerator

A Fully managed in-memory cache for DynamoDB

DynamoDB Accelerator (DAX)

What is used to make a DynamoDB table accessible with low latency in multiple regions?

DynamoDB Global Tables

What can DynamoDB replace as a key/value data store?

ElastiCache

For DynamoDB Security, authentication, and authorization, everything is done through _______________

IAM

What type of data goes into Dynamo DB

Key/value pairs

What does DynamoDB streams integrates with

Lambda

DynamoDB - part of the tables Primary Key. - It has a hashed value that is used to retrieve items from your table - it is used to allocate data across hosts for scalability and availability

Partition Key

DynamoDB allows Streams to integrate with other AWS services (T/F)

T

DynamoDB Global Tables are: Active/Active or active/passive

active/active