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An application running on AWS uses an Amazon Aurora Multi-AZ deployment for its database.
When evaluating performance metrics, a solutions architect discovered that the database reads are causing high I/O and adding latency to the write requests against the database.
What should the solutions architect do to separate the read requests from the write requests?- A. Enable read-through caching on the Amazon Aurora database
- B. Update the application to read from the Multi-AZ standby instance
- C. Create a read replica and modify the application to use the appropriate endpoint
- D. Create a second Amazon Aurora database and link it to the primary database as a read replica.
Answer: C
Explanation:
Aurora Replicas are independent endpoints in an Aurora DB cluster, best used for scaling read operations and increasing availability. Up to 15 Aurora Replicas can be distributed across the Availability Zones that a DB cluster spans within an AWS Region.
The DB cluster volume is made up of multiple copies of the data for the DB cluster. However, the data in the cluster volume is represented as a single, logical volume to the primary instance and to Aurora Replicas in the DB cluster.
As well as providing scaling for reads, Aurora Replicas are also targets for multi-AZ. In this case the solutions architect can update the application to read from the Multi-AZ standby instance.
References:
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.Replication.html
NEW QUESTION 42
A solutions architect is developing a multiple-subnet VPC architecture. The solution will consist of six subnets in two Availability Zones. The subnets are defined as public, private and dedicated for databases Only the Amazon EC2 instances running in the private subnets should be able to access a database.
Which solution meets these requirements?- A. Create a new peering connection between the public subnets and the private subnets. Create a different peering connection between the private subnets and the database subnets.
- B. Create a now route table that excludes the route to the public subnets' CIDR blocks Associate the route table lo the database subnets.
- C. Create a security group that allows ingress from the security group used by instances in the private subnets. Attach the security group to an Amazon RDS DB instance.
- D. Create a security group that denies ingress from the security group used by instances in the public subnets Attach the security group to an Amazon RDS DB instance
Answer: C
NEW QUESTION 43
A company wants to build an online marketplace application on AWS as a set of loosely coupled microservices. For this application, when a customer submits a new order, two microservices should handle the event simultaneously. The Email microservice will send a confirmation email, and the OrderProcessing microservice will start the order delivery process. It a customer cancels an order, the OrderCancelation and Email microservices should handle the event simultaneously.
A solutions architect wants to use Amazon Simple Queue Service (Amazon SOS) and Amazon Simple Notification Service (Amazon SNS) to design the messaging between the microservices.
How should the solutions architect design the solution?- A. Create a single SQS queue and publish order events to it. The Email. OrderProcessing. and Order Cancellation microservices can then consume messages of the queue.
- B. Create three SNS topics for each microservice. Publish order events to the three topics. Subscribe each of the Email. OrderProcessing. and Order Cancellation microservices to its own topic.
- C. Create an SNS topic and publish order events to it. Create three SQS queues for the Email.
OrderProcessing. and Order Cancellation microservices. Subscribe all SQS queues to the SNS topic with message filtering - D. Create two SQS queues and publish order events to both queues simultaneously. One queue is for the Email and OrderProcessing microservices. The second queue is for the Email and Order Cancellation microservices.
Answer: D
NEW QUESTION 44
A solutions architect is designing a web application that will run on Amazon EC2 instances behind an Application Load Balancer (ALB) The company strictly requires that the application be resilient against malicious internet activity and attacks, and protect against new common vulnerabilities and exposures
What should the solutions architect recommend?- A. Subscribe to AWS Shield Advanced and ensure common vulnerabilities and exposures are blocked
- B. Configure network ACLs and security groups to allow only ports 80 and 443 to access the EC2 instances
- C. Deploy an appropriate managed rule for AWS WAF and associate it with the ALB
- D. Leverage Amazon CloudFront with the ALB endpoint as the origin
Answer: C
NEW QUESTION 45
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