Amazon Web Services SOA-C02 Exam With Confidence Using Practice Dumps

If EC2 instances in one region (eu-central-1) need to access a database in another (us-east-1), and the database must remain only in us-east-1, the most operationally efficient solution is a VPC peering connection.

From the VPC Peering documentation:

Inter-Region VPC peering enables routing of traffic between VPCs in different AWS Regions using private IP addresses, without VPN or additional hardware.

Also:

You must manually update security group rules to allow traffic from the peered VPC.

So:

Create the VPC peering

Add the private IP range of the remote EC2 instances to the inbound rules of the database’s security group

Scaling Policies in Auto Scaling:

When multiple scaling policies trigger at the same time, each policy is executed independently.

If both policies are set to add 5 instances when CPU utilization reaches 80%, they will both be executed when the threshold is met.

Therefore, the total number of instances added will be the sum of the instances specified in both policies.

In this case, 5 instances from one policy and 5 instances from the other policy will result in a total of 10 instances being added.

Steps to Configure and Verify Scaling Policies:

Go to the AWS Management Console.

Navigate to EC2 and select "Auto Scaling Groups."

Select your Auto Scaling group and review the scaling policies.

Ensure that both scaling policies are configured to trigger at 80% CPU utilization.

Monitor the Auto Scaling group's activity to verify the addition of instances when the CPU utilization threshold is reached.

Scaling Policies for Amazon EC2 Auto Scaling

To achieve maximum cost savings and flexibility for a 24/7 running application across different AWS regions and operating systems, the best approach is to use a Compute Savings Plan. Compute Savings Plans provide the most flexibility by automatically applying to any EC2 instance usage regardless of instance family, size, OS, tenancy, or AWS Region, and also apply to AWS Fargate and AWS Lambda usage.

Understand Compute Savings Plans:

Compute Savings Plans offer significant savings over On-Demand prices, with the flexibility to use the compute option that best suits your needs.

Purchase a Compute Savings Plan:

Login to the AWS Management Console.

Navigate to the Savings Plans section.

Choose Purchase Savings Plan and select Compute Savings Plan.

Define the hourly commitment amount and the term length (one or three years).

Monitor and Optimize Usage:

Ensure that your usage aligns with the Savings Plan to maximize savings.

Use AWS Cost Explorer and Savings Plans Utilization reports to monitor usage.

Savings Plans

Compute Savings Plans