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THE FEUTEX TOOLKIT

Distributed Trace Volume

Estimate spans and raw storage from sampled requests and span fanout.

Computer Systems workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaStored spans per second = r*s/100*sp; Raw retention volume = r*s/100*sp*b*86400*d/1e9

Made for real tasks

  • Estimate spans and raw storage from sampled requests and span fanout.
Explore step-by-step workflows →

Worked example

Inputs

Requests per second
500 requests/s
Trace sampling
5 %
Spans per trace
12 spans
Bytes per span
800 bytes
Retention
7 days

Expected results

Stored spans per second
300 spans/s
Raw retention volume
145.152 GB

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 requests per second, trace sampling, spans per trace, bytes per span, retention in the displayed units.
  2. Calculate the scenario, then compare it with measurements before changing a system.

Try this example

{
  "r": 500,
  "s": 5,
  "sp": 12,
  "b": 800,
  "d": 7
}

Accuracy and scope

Head sampling with fixed average fanout; tail sampling and index overhead excluded.

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.