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NixOS · Toolchain · Hiring: remote nixos-tools engineer (full-time, long-term)

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NIr/nixos-tools·posted by ops_wang·5 minutes agoAnnouncement

Hiring: remote nixos-tools engineer (full-time, long-term)

Some background first. Our setup is nixos-tools plus three downstream services, seven figures of daily requests, peaking around nine in the evening.

What genuinely surprised me was the tail. The average looked great while P99 jumped by an order of magnitude past some threshold. The cause was not nixos-tools itself but our upstream connection reuse — the load test traffic was too clean and hid the long-tail requests.

Image placeholder · object storage in production
POST /api/uploads → CDN origin pull
3 comments

3 comments

M
Llinlin·just now

I see point 3 differently. The trade-off depends on your read/write ratio: read-heavy with little writing means caching actually widens the inconsistency window.

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Oops_wang·28 minutes ago

Has anyone run a controlled experiment? I did, reducing it to a single variable, and the difference was 4% — within noise. So I suspect the main cause is something else.

48
Hhuang_ke·just now

Thanks for sharing real numbers — far more useful than the articles that only cover concepts.

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