compio-rs/compio

Deterministic runs?

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#568 opened on Dec 12, 2025

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 (4 comments) (1 reaction) (0 assignees)Rust (120 forks)github user discovery
enhancementhelp wanted

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Description

Hey! Awesome project!

I'm building a small storage engine and compio seems the best fit for it, however, the project is built from the ground up with Deterministic Simulation Testing (DST) and in order to it use compio I need to have sure that, given the same key, every run goes exactly the same (or at least exactly enough). Idk, if it's in the roadmap but it would be quite useful.

Edit: "given the same seed"

Contributor guide

Research direction
Investigate whether compio's event loop and I/O operations (io uring/IOCP) yield deterministic results when using the same seed. Check documentation and source code for any randomness sources. If not deterministic, assess feasibility of adding a deterministic mode.
Tech stack
rust
Domain
backend
Issue type
Research
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
RustAsync runtime concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40