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Round robin over four servers, before the sale.Ash 0 waiting · Birch 0 waiting · Cedar 0 waiting · Dogwood 0 waiting
Chapter 5 of 7
Same customer, same server
Customers fill carts during the sale. Each server keeps the carts it built in its own memory, and the balancer sends requests anywhere.
This chapter: How do you keep a customer’s cart, and what happens when its server dies?
About this chapter
You will learn
- A cart kept on one server is missing when the next request lands elsewhere
- Sticky sessions send a customer back to the same server
- A shared cart store outlives any one server
Words you’ll meet
- Session
- What a site remembers about one customer between requests, like their cart.
- Sticky sessions
- Sending every request from one customer to the same server.
Step 1 of 5
Each server keeps the , the cart, of whoever it served. Round robin sends Priya somewhere new each time.
Run the sale.