UUIDs are obsolete in the age of Docker
leonid.shevtsov.me
UUIDs are obsolete in the age of Docker
1–10 of 39 posts
Re: UUIDs are obsolete in the age of Docker
#2Is anyone even still using non-random UUIDs? Every application I've ever seen them use is using v4.
Re: UUIDs are obsolete in the age of Docker
#3> this is only correct about UUID version 1. However, it is what most applications use.
This is a bold claim and doesn't match my experience at all. UUIDv4 is all I see, everywhere, everyday.
That's also a big enough caveat to put in the title: if you have a beef with UUIDv1, say UUIDv1 is obsolete.
Re: UUIDs are obsolete in the age of Docker
#4As the article points out, this is only an issue with UUIDv1. They claim "However, it is what most applications use." but I have no idea how true this is. I was under the impression that the vast majority of UUID generators were v4 by default. For example:
Postgres only offers random uuid generation (https://www.postgresql.org/docs/15/functions-uuid.html).
The `uuidgen` CLI tool, at least for modern versions (I have not checked historically), says (from https://man7.org/linux/man-pages/man1/uuidgen.1.html): "By default uuidgen will generate a random-based UUID if a high-quality random number generator is present." (later it lists /dev/random as such a generator, present on almost all systems)
What's an example of a system that generates v1 uuids by default?
Re: UUIDs are obsolete in the age of Docker
#5I was confused by this title because I only use uuid v4...the author covers that in the article, but I'm surprised that so many people use uuid v1. I thought v4 was the most popular, but that's probably just because I mostly work with my own code
Re: UUIDs are obsolete in the age of Docker
#6> this is only correct about UUID version 1. However, it is what most applications use. This is a bold claim and doesn't match my experience at all. UUIDv4 is all I see, everywhere, everyday. That's also a big enough caveat to put in the title: if you have a beef with UUIDv1, say UUIDv1 is obsolete.
Yeah I agree that this isn't true, every popular uuid package uses V4 by default and all the places I've worked used V4 when they were using UUIDs.
Re: UUIDs are obsolete in the age of Docker
#7What about ulid as an alternative?
Re: UUIDs are obsolete in the age of Docker
#8> If you require a globally unique string ID, consider URIs
Is my knee-jerk judgement that this advice borders on nonsense, unwarranted?
Re: UUIDs are obsolete in the age of Docker
#9Is anyone even still using non-random UUIDs? Every application I've ever seen them use is using v4.
Yeah, everything I’ve seen (and written) which uses UUIDs uses UUIDv4, and the main alternative for similar use seems to be ULID, not any of the other UUID versions.
Re: UUIDs are obsolete in the age of Docker
#10Is there any reason to use anything except completely random UUIDs? I vaguely remember reading about problems with MAC-based UUIDs decades ago, my impression was that they have been discouraged for a long time already.