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Drill

Every backend looks fine

Each backend meets its target, yet search often feels slow. Work out how often.

2 minMedium

Members lesson

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What you'll be able to do

  1. 1Predict how the tail grows when one request fans out to several backends.

Inside the lesson

steps
2
question
1
simulations
0

Step 1 · The setup

Every one of the search page's 30 backends shows a healthy dashboard: only 1% of its calls are slow. But the page waits for all 30 before it answers — and users say search is often sluggish.

Step 2 is for members