Estimate Food Delivery System Design

4. Calculation & estimation

Assumptions

For the sake of simplicity, we can make these assumptions:

• There are 2 million monthly active users, a total of 20 million users, 300k restaurants, and 200k drivers deliver food.
• On average, there are 20 million deliveries per year.

Data size

• For 1 month, we collected data on 2 millions deliveries. Each delivery has around 500 bytes related features.
• Total size: 500 * 2 * $10^{6}$ = $10^9$ bytes = 1 Gigabytes.

Scale

• Support 20 million users

5. System Design