Comment by dreyfan | Hacker News Reader

Comment by dreyfan | Hacker News Reader

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> Did anyone really think that every time someone makes a DNS update it is broadcasted to every DNS resolver on the internet?

Absolutely. All of these, especially to an average person, imply the data takes a while to be pushed out "across the internet".

GoDaddy [1]: "but it can take up to 48 hours for everything to propagate across the Internet"

Namecheap [2]: "it is a period of time ISP (Internet service provider) nodes across the world take to update their caches with the new DNS information of your domain."

AWS [3]: "DNS propagation is the amount of time that it takes for DNS changes to be updated across the internet"

[1] https://www.godaddy.com/help/what-factors-affect-dns-propaga...

[2] https://www.namecheap.com/support/knowledgebase/article.aspx...

[3] https://aws.amazon.com/premiumsupport/knowledge-center/route...

Which, again, just translates to "but it can take up to 48 hours for other nameservers to have caught up".

Those are both true statements. They also don't imply a push model.

I don't really see the point of your comment, besides to express some sort of overly pedantic characterization of push vs pull event propagation techniques.

You're the one making the distinction.

Am I? I don’t have a horse in this race.

I responded because I felt the “Did anyone really think” comment was arrogant and dismissive. I provided examples where a layperson could easily reach that conclusion.

Yes. It’s the effect that propagates.

They do imply a push. A pull would mean that things mightn't spread across the internet in the event no-one requested them. Those statements do imply that things just get spread across the internet automatically.

Can news propagate?

If someone claimed that in 48 hours everyone on the planet would've heard some news, that would imply a push, yes.

"By 48 hours, the news will have spread around the globe." (a more natural phrasing than propagate in the context of news, but I think pretty identical in implication) does not imply a push model, I just completely disagree with you.

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