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THE FEUTEX TOOLKIT

Retry Request Amplification

Estimate backend load from independent failures with a capped retry policy.

Computer Systems workspace● Runs in your browser
01 Your input
02 Your result
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FormulaExpected attempts per request = (1-(p/100)**n)/(1-p/100); Backend attempt rate = rate*(1-(p/100)**n)/(1-p/100)

Made for real tasks

  • Estimate backend load from independent failures with a capped retry policy.
Explore step-by-step workflows →

Worked example

Inputs

Original request rate
100 requests/s
Failure probability
20 %
Maximum attempts
3 attempts

Expected results

Expected attempts per request
1.24 attempts
Backend attempt rate
124 attempts/s

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter original request rate, failure probability, maximum attempts in the displayed units.
  2. Calculate the scenario, then compare it with measurements before changing a system.

Try this example

{
  "rate": 100,
  "p": 20,
  "n": 3
}

Accuracy and scope

Independent equal failure probability per attempt; excludes hedging and retry time distribution.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.