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shadow

Shadow is a discrete-event network simulator that directly executes real application code, enabling you to simulate distributed systems with thousands of network-connected processes in realistic and scalable private network experiments using your laptop, deskt

by shadow · GitHub
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controlemulationexperimentationRust
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Simulate large networks with thousands of connected processes using real application code.

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1 7081 707
2026-07-202026-08-31
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📄 About

Shadow is a discrete-event network simulator that directly executes real application code, enabling you to simulate distributed systems with thousands of network-connected processes in realistic and scalable private network experiments using your laptop, deskt

shadow has 1.7k stars on GitHub. It has been forked 277 times. shadow is written mainly in Rust. It has been in active development since 2011. Its main topics are control, emulation, experimentation, networking.

Frequently asked questions

What is shadow?

Shadow is a discrete-event network simulator that directly executes real application code, enabling you to simulate distributed systems with thousands of network-connected processes in realistic and scalable private network experiments using your laptop, deskt

Is shadow open source?

shadow is an open-source project.

Is shadow free?

Yes. shadow is free and open source — you can use, modify and self-host it.

What language is shadow written in?

shadow is written mainly in Rust.

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