VPC Cost

VPC Overview

Price Influencers

• The most significant price contributor are the EC2 instances, specifically the JupyterHub instance as it has the highest CPU and RAM configuration of all services.
• Intra-availability zone traffic is free. Therefore all DCA services are built using the same availability zone (i.e. us-east-2a).
• An Elastic IP is needed for the NAT gateway. The NAT gateway is required to provide out-going internet access to instances in the private subnet (i.e updates).
• All data transfer in to DCA is free. The cost model below assumes 2GB of data transfer out per month.
• The VPN gateway allows administrators to connect to instances in the private subnet and for on-premise resources (i.e. SQL Server) to connect to private subnet instances (i.e. SQL Server data migration to PostgreSQL). The VPN gateway accrues charges for every hour of operation. Costs could be reduced significantly by scripting the provision/decommission of using the AWS CLI.

Compute and Storage Summary

• DCA has three core services: The Littlest JupyterHub (TLJH), Pgweb, and the Elastic Stack. Combined, they have 56 computing cores, 176 GB of RAM, and more than 1.5 terabytes of secondary storage
• DCA has an additional terabyte of S3 storage
• Physical server with similar technical specifications from Dell would cost: $18,192 (no software licenses)

Compute/Storage by EC2 Instance

Cost Highlights

Itemized Cost Breakdown (Paid up-front)

• Assumes services will run 24/7
• Prices for EC2 instances assume service costs for the year are paid up front, resulting in approximately 50% savings when compared to the on-demand, hourly costs.