dpcc
Digital Preservation Cost Calculator
Quick Start
The latest build from master should always be at https://umd-coding-workshop.github.io/dpcc
Building and Testing
Requires NodeJS. Use Grunt and Browserify to build and test the Web UI:
# install the build tools
npm -g install grunt-cli browserify
# build and run for testing
npm install
grunt
./server.js
Command-Line Program
There is also a dpcc-cli.js script that runs on the command line using NodeJS. It takes two arguments: the amount of data to store, and how long to store it for, and produces a chart of the costs for the various services defined in the services.json file.
# install dependencies
npm install
# estimate costs for 50 TB stored for 5 years
./dpcc-cli.js 50 5
Initial Brainstorm
Dimensions
[$] money
[B] storage
[T] time
Units
dollars, terabytes, years
User supplied inputs
- service (sets the rates and variables)
- amount [B] (e.g., "50 TB")
- time [T] (e.g., "5 years")
Rates
ingest cost [$]/[B]
membership fee [$]/[T]
storage rate [$]/[B][T]
Variables
included storage [B]
storage increment [B] (e.g., APTrust sells storage in 5TB increments)
Formulas
storage cost = storage rate * ceiling(non_negative(amount - included storage)/storage increment) * storage increment
function non_negative(x) {
return x >= 0 ? x : 0;
}