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Zorluk: ZorCost-Effective Network Routing and Data Transfer Optimization

An organization runs a data processing application on Amazon EC2 instances in a private subnet within the us-east-1 Region. Every day, the application writes 15 TB15\text{ TB} of processed analytics data directly to an Amazon S3 bucket located in the us-west-2 Region. Currently, the private subnet's route table sends all internet-bound traffic (0.0.0.0/00.0.0.0/0) through a NAT Gateway in a public subnet. The organization wants to modify the architecture to minimize data transfer costs. Which solution will reduce the data transfer costs the most?

  1. Provision a local Amazon S3 bucket in the us-east-1 Region and create an S3 Gateway VPC Endpoint in the VPC. Configure the application to write data to the local bucket, and enable S3 Cross-Region Replication (CRR) to replicate the files to the bucket in us-west-2.Cevap
  2. B
    Create an S3 Gateway VPC Endpoint in the us-east-1 VPC, and associate it with the private subnet's route table. Update the application to write directly to the S3 bucket in us-west-2 using the gateway endpoint's public DNS name.
  3. C
    Create an S3 Interface VPC Endpoint (AWS PrivateLink) in the private subnet in us-east-1. Configure the application to route the cross-region S3 traffic through the interface endpoint to reach the bucket in us-west-2.
  4. D
    Establish an AWS Site-to-Site VPN connection from the VPC in us-east-1 to the S3 endpoint in us-west-2. Update the private subnet's route table to route S3 traffic through the VPN gateway.

Cevap

Provision a local Amazon S3 bucket in the us-east-1 Region, create an S3 Gateway VPC Endpoint, write data locally, and use S3 Cross-Region Replication (CRR) to replicate the files to the bucket in us-west-2.
The correct option is to write data to a local S3 bucket in us-east-1 via a Gateway VPC Endpoint, and then use S3 Cross-Region Replication (CRR) to copy it to us-west-2. S3 Gateway Endpoints are free of charge but only route traffic to S3 buckets in the same Region. Writing to a local bucket via the Gateway Endpoint completely bypasses the NAT Gateway processing fees (0.045perGB).S3CRRthenreplicatesthedatatous−west−2overtheAWSnetworkbackbone,incurringonlythestandardcross−regiondatatransferfee(0.045 per GB). S3 CRR then replicates the data to us-west-2 over the AWS network backbone, incurring only the standard cross-region data transfer fee ( 0.02 per GB) and avoiding any NAT Gateway charges.

Adım Adım Çözüm

1
Analyze the current data transfer path and costs.
Writing 15 TB15\text{ TB} daily from EC2 (us-east-1) to S3 (us-west-2) via a NAT Gateway costs 15,000×$0.045=$67515,000 \times \$0.045 = \$675 per day in NAT Gateway processing fees, plus 15,000×$0.02=$30015,000 \times \$0.02 = \$300 per day in cross-region data transfer fees, totaling \$975 daily.
This establishes the baseline cost to optimize.
2
Evaluate the regional constraints of S3 Gateway Endpoints.
S3 Gateway Endpoints only route traffic to S3 buckets in the same Region (us-east-1). Direct transfers to us-west-2 cannot use the local Gateway Endpoint and will continue to traverse the NAT Gateway.
Understanding S3 Gateway Endpoint limitations prevents choosing ineffective configurations.
3
Design a routing path that bypasses the NAT Gateway.
By writing to a local S3 bucket in us-east-1, traffic stays within the same region and is routed through the free S3 Gateway Endpoint, incurring \$0 in NAT Gateway processing and data transfer charges.
Bypassing the NAT Gateway eliminates the largest component of the daily network charges.
4
Replicate the data to the target region using the AWS backbone.
Enabling S3 Cross-Region Replication (CRR) copies the data from us-east-1 to us-west-2. S3 CRR bypasses the NAT Gateway and charges only the standard cross-region data transfer rate of \$0.02 per GB, reducing the total daily cost to \$300.
This satisfies the requirement to store the data in us-west-2 at the minimum possible cost.

Anahtar Kavram

S3 Gateway Endpoints are region-specific and free of charge. To avoid NAT Gateway charges for cross-region S3 transfers, data should be written to a local bucket via a Gateway Endpoint and replicated to the destination region using S3 Cross-Region Replication (CRR).
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Cost-Effective Network Routing and Data Transfer Optimization