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Using Cloudflare CDN to synchronize a clock (alexsci.com)
submitted 6 months ago by to c/programming@programming.dev
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[–] 2 points 6 months ago (1 child)

their CDN is not a time service

No but time.cloudflare.com is. If I recall correctly, the server clocks are synchronised with the same time service. (Source: I work at Cloudflare)

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  • [–] [S] 1 point 6 months ago

    Cool, thanks for taking a look! Do you know of any official reference for how the Cloudflare CDN server clocks are synced? I looked around but didn't find one.

    I originally built the clock on Fastly, but they (appear to) have clock offsets of hundreds of milliseconds, so I didn't release that version. Cloudflare CDN seems synchronized better than what I can measure, although I'm wary of hard to test corner cases, like newly deployed servers.

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