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Question 576 - SAA-C03 discussion

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A company's ecommerce website has unpredictable traffic and uses AWS Lambda functions to directly access a private Amazon RDS for PostgreSQL DB instance. The company wants to maintain predictable database performance and ensure that the Lambda invocations do not overload the database with too many connections.

What should a solutions architect do to meet these requirements?

A.
Point the client driver at an RDS custom endpoint. Deploy the Lambda functions inside a VPC.
Answers
A.
Point the client driver at an RDS custom endpoint. Deploy the Lambda functions inside a VPC.
B.
Point the client driver at an RDS proxy endpoint. Deploy the Lambda functions inside a VPC.
Answers
B.
Point the client driver at an RDS proxy endpoint. Deploy the Lambda functions inside a VPC.
C.
Point the client driver at an RDS custom endpoint. Deploy the Lambda functions outside a VPC.
Answers
C.
Point the client driver at an RDS custom endpoint. Deploy the Lambda functions outside a VPC.
D.
Point the client driver at an RDS proxy endpoint. Deploy the Lambda functions outside a VPC.
Answers
D.
Point the client driver at an RDS proxy endpoint. Deploy the Lambda functions outside a VPC.
Suggested answer: B

Explanation:

To maintain predictable database performance and ensure that the Lambda invocations do not overload the database with too many connections, a solutions architect should point the client driver at an RDS proxy endpoint and deploy the Lambda functions inside a VPC. An RDS proxy is a fully managed database proxy that allows applications to share connections to a database, improving database availability and scalability. By using an RDS proxy, the Lambda functions can reuse existing connections, rather than creating new ones for every invocation, reducing the connection overhead and latency. Deploying the Lambda functions inside a VPC allows them to access the private RDS DB instance securely and efficiently, without exposing it to the public internet.Reference:

Using Amazon RDS Proxy with AWS Lambda

Configuring a Lambda function to access resources in a VPC

asked 16/09/2024
K W
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