Storage and Database

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A team has an application that detects new objects being uploaded into an Amazon S3 bucket. The uploads trigger a Lambda function to write object metadata into an Amazon DynamoDB table and RDS PostgreSQL database.


Which action should the team take to ensure high availability?


A. Enable cross-region replication in the Amazon S3 bucket.


B. Create a Lambda function for each Availability Zone the application is deployed in.


C. Enable multi-AZ on the RDS PostgreSQL database.


D. Create a DynamoDB stream for the DynamoDB table.
 
DynamoDB databases are Highly available by default unlike RDS so to ensure HA you should focus on enabling Multi-AZ on the RDS PostgreSQL
 
@isla it is AWS who says that ... I got this from the AWS documentation:  stores data on Solid State Drives (SSDs)  and replicates it synchronously across multiple AWS Availability Zones in an AWS Region to provide built-in high availability and data durability.


so you don't need to do anything to ensure DynamoDB HA it's not the case with RDS
 
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