[hk1337]

The problem isn't DNS though, is it? The problem is that people don't necessarily use the redundancies on DNS?

The whole reason it takes a domain 24h to fully work with DNS is because it propagates the information other DNS servers, thus making not be a centralized service.

[jameshart]

DNS doesn't 'propagate' except in the very limited case of zone-transfer publication, which... nobody really relies on these days. Registrars tell you it takes 24 hours to propagate to stop you from complaining to them about your ISP's DNS caching policy. The reality is: recursing DNS servers have caches, they respect TTLs, and for the most part that means that DNS changes should fully wash through within an hour for most changes (less if you keep your TTLs shorter).

[unilynx]

That differs per TLD though. In .nl updates are usually fully processed within the hour (they update the zone file twice per hour)

[topranks]

More accurately there are distributed caches, which expire on a simple timer basis, as opposed to updates being pushed immediately.

Relatively short TTLs are ubiquitous these days though.