#uuid on Hacker News

9 stories tagged uuid, newest first.

Screenshot of alexsci.com: UUIDv7: Timestamps aren’t time-ordered and other oddities

UUIDv7: Timestamps aren’t time-ordered and other oddities (alexsci.com)

150 points by ibobev 2 days ago | 121 comments

Blog post arguing that UUIDv7 does not reliably provide monotonic ordering, accurate creation timestamps, or unguessability, examining RFC 9562 and implementations like Python's.

uuidv7 uuid rfc-9562 python

Ask HN: We just had an actual UUID v4 collision...

335 points by mittermayr 5 months ago | 270 comments

Ask HN post describing an apparent UUID v4 collision from the npm uuid package in a database of about 15,000 records, asking if others have seen this.

uuid uuid-v4 npm javascript

Screenshot of github.com: UUID package coming to Go standard library

UUID package coming to Go standard library (github.com)

338 points by soypat 7 months ago | 217 comments

GitHub issue in the golang/go repo proposing a crypto/uuid standard library package to generate and parse UUIDs (versions 3, 4, 5), now in final comment period.

go uuid standard-library golang-proposal

Screenshot of jasonfantl.com: Cosmologically Unique IDs

Cosmologically Unique IDs (jasonfantl.com)

443 points by jfantl 8 months ago | 140 comments

A blog post by Jason Fantl exploring how to generate IDs that would remain unique across the entire universe, from UUIDs to cosmological scales.

uuid unique-identifiers distributed-systems probability

Screenshot of andyatkinson.com: Avoid UUID Version 4 Primary Keys in Postgres

Avoid UUID Version 4 Primary Keys in Postgres (andyatkinson.com)

336 points by pil0u 10 months ago | 370 comments

Blog post by Andrew Atkinson arguing against using random UUID version 4 values as primary keys in PostgreSQL, covering performance issues and alternatives.

postgresql uuid primary-keys database-performance

Screenshot of everyuuid.com: Every V4 UUID

Every V4 UUID (everyuuid.com)

1334 points by LorenDB 1 year ago | 351 comments

A novelty website by eieio that lists every possible version 4 UUID in a scrollable, searchable list with copy and favorite buttons.

uuid uuid-v4 web-toy eieio

Screenshot of maciejwalkowiak.com: PostgreSQL and UUID as Primary Key

PostgreSQL and UUID as Primary Key (maciejwalkowiak.com)

387 points by taubek 2 years ago | 296 comments

A blog post by Maciej Walkowiak discussing the use of UUIDs as primary keys in PostgreSQL, including storage and performance considerations, with Java examples.

postgresql uuid primary-keys java

Screenshot of buildkite.com: Goodbye integers, hello UUIDv7

Goodbye integers, hello UUIDv7 (buildkite.com)

643 points by juanfatas 3 years ago | 321 comments

Buildkite blog post explaining their move from integer primary keys to time-ordered UUIDv7 identifiers.

uuidv7 uuid primary-keys postgresql

Screenshot of github.com: Type-safe, K-sortable, globally unique identifier inspired by Stripe IDs

Type-safe, K-sortable, globally unique identifier inspired by Stripe IDs (github.com)

371 points by dloreto 3 years ago | 198 comments

GitHub repository for TypeID, a type-safe, K-sortable, globally unique identifier format based on UUIDv7 and inspired by Stripe IDs.

typeid uuidv7 uuid unique-identifiers