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Zorluk: Çok zorData Transfer Cost Optimization

A company's SysOps administrator is reviewing the monthly AWS billing report and notices high charges under 'EC2-Other' due to NAT Gateway data processing fees and cross-Availability Zone (cross-AZ) billing. The application architecture consists of EC2 instances hosted in private subnets across three Availability Zones (`us-west-2a`, `us-west-2b`, and `us-west-2c`) within a single VPC in the `us-west-2` Region. These instances upload approximately 80 TB80\text{ TB} of data monthly to an Amazon S3 bucket located in the same Region. Currently, the VPC is configured with a single NAT Gateway in `us-west-2a`, and all private subnet route tables direct default outbound traffic (0.0.0.0/00.0.0.0/0) to this NAT Gateway. Which of the following is the most cost-effective solution to eliminate these data transfer charges while keeping the instances within private subnets?

  1. Create an Amazon S3 Gateway VPC Endpoint, associate it with the route tables of all private subnets across the three Availability Zones, and ensure the S3 bucket policy permits access from the VPC.Cevap
  2. B
    Deploy Interface VPC Endpoints (AWS PrivateLink) for Amazon S3 in the private subnets of all three Availability Zones, and update the application configuration to connect via the private endpoint DNS.
  3. C
    Deploy a dedicated NAT Gateway in the public subnet of each Availability Zone, and update the private subnet route tables to route outbound traffic through their respective local NAT Gateway.
  4. D
    Create an Amazon S3 Gateway VPC Endpoint and associate it only with the public subnet's route table where the NAT Gateway is deployed, allowing the private subnets to continue using their current default route.

Cevap

Create an Amazon S3 Gateway VPC Endpoint, associate it with the route tables of all private subnets across the three Availability Zones, and ensure the S3 bucket policy permits access from the VPC.
The correct option is to create a S3 Gateway VPC Endpoint and associate it with the private subnets' route tables. Amazon S3 Gateway Endpoints are a free feature that routes S3 traffic directly over the AWS internal network, avoiding both NAT Gateway data processing fees ($0.045/GB) and cross-AZ charges.

Adım Adım Çözüm

1
Analyze the current data path and cost components.
The current path routes S3 traffic from all private subnets (including us-west-2b and us-west-2c) to a single NAT Gateway in us-west-2a. This incurs cross-AZ charges (0.01/GBineachdirection)andNATGatewayprocessingcharges(0.01/GB in each direction) and NAT Gateway processing charges ( 0.045/GB).
Identifying where the data transfer fees originate allows us to target them for optimization.
2
Evaluate the cost of alternative routing mechanisms for Amazon S3 traffic.
Gateway VPC Endpoints for S3 are free of charge (both hourly and data processing fees), whereas Interface VPC Endpoints charge hourly rates plus 0.01/GBprocessingfees,andNATGatewayschargehourlyratesplus0.01/GB processing fees, and NAT Gateways charge hourly rates plus 0.045/GB processing fees.
Comparing available options ensures the most cost-effective solution is selected.
3
Determine the required route table modifications.
The Gateway VPC Endpoint must be associated with the route tables of the private subnets containing the EC2 instances so that traffic destined for S3 is routed directly through the endpoint rather than the default route to the NAT Gateway.
If the route tables are not updated, traffic will continue to route through the NAT Gateway, resulting in no cost savings.

Anahtar Kavram

Using Gateway VPC Endpoints to optimize data transfer costs for Amazon S3 traffic within a VPC.
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Konular

Data Transfer Cost Optimization

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