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Chapter 1 of 7
Far is slow
Larkspur’s online shop runs from one central depot. Customers in three regions shop all day, and the West says pages crawl.
This chapter: Why does a customer far from the depot wait longer?
About this chapter
You will learn
- Every request without a copy makes a round trip to the origin
- Why the wait grows with distance
- Why every customer’s trip lands on the same depot
Words you’ll meet
- Origin
- The server that holds the real copy of every page: here, Larkspur’s central depot.
- Round trip
- A request’s journey to the origin and the reply’s journey back.
- Latency
- How long a customer waits between asking and getting the reply.
Step 1 of 5
Every request travels to the depot, the , and back: a . The wait is its .
Send one from North.