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Storage and Database

 

purnachandrasharma1@gmail.com
(@purnachandrasharma1gmail-com)
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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.


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marcus M.HIGGIN
(@marcus-m-higgin)
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DynamoDB databases are Highavailable by default unlike RDS so to ensure HA you should focus on enabling Multi-AZ on the RDS PostgreSQL

 


krackout and Isla liked
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Isla
 Isla
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@marcus-m-higgin why is DynamoDB HA by default??

 


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marcus M.HIGGIN
(@marcus-m-higgin)
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@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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