Design E-commerce Store

Design an E-commerce store like Amazon

• Product Catalog: The service should have a product catalog where sellers can list their products and buyers can browse or search for products.
• Inventory Management: The service should keep track of the inventory for each product. It should update the inventory as products are sold and possibly alert the seller when the inventory is low.
• Shopping Cart: Users should be able to add items to a shopping cart and checkout when ready.
• Order Management: Users should be able to view their order history, track their orders, and request returns or refunds.

• 10M Daily Active Users
• Read:write ratio = 100: 1
• Data retention for 5 years
• Assuming 1 million write requests per day
• Assuming each entry is about 1KB