Tinkerp50 54 ms, p99 1,000 ms, over 395 requests.
Cedar dies and Dogwood turns slow but answering. 149 failed, 0% extra copies.Ash 0 waiting · Birch 0 waiting · Cedar 0 waiting · Dogwood 0 waiting
Chapter 7 of 7
Route the sale
Sale day again: Cedar will die and Dogwood will turn slow but answering. Carts now live in a shared store.
This chapter: Which rule, health check and hedge keep the slowest customers fastest?
About this chapter
You will learn
- How rules, health checks and hedging work together
- Reading p99 against a budget for extra copies
- Why more than one setup can be best
Words you’ll meet
- Budget
- Limits the team sets: here, no failed requests and a cap on extra copies.
Step 1 of 2
The team’s : no failed requests, and hedging may add at most 15% extra copies.
Find the lowest p99 within it.
1,000 ms p99 OVER BUDGET
| Measure | This setup | Budget |
|---|---|---|
| Failed requests | 149 | 0 |
| Extra copies | 0% | at most 15% |
| p99 | 1,000 ms | lowest wins |
Carts live in a shared store now, so sticky sessions stay off.
A simulated sale: Larkspur’s own traffic and planning numbers, not a measurement of any real server or balancer.