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Universally Unique Lexicographically Sortable Identifier

15 mentions on Hacker News by 15 people: 3 stories, 12 comments · first 2016-08-01 · latest 2025-12-10

Mentions per year 15 mentions · busiest year 2017 (9)
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  1. > I hope that's not literally incrementing a sequence It's literally incrementing it by one: https://github.com/ulid/javascript/blob/11c2067821ee19e4dc78... https://github.com/ulid/javascript/blob/11c2067821ee19e4dc78...
    comment by sedatk · 2025-12-10 · in ULID: Universally Unique Lexicographically Sortable Identifier
  2. …ter-within-the-same-millisecond-behavior only happens if you explicitly specify a "monotonicFactory", https://github.com/ulid/javascript#monotonic-ulids . The default behavior (just using the ulid() function) doesn't do that, it generates…
    comment by hn_throwaway_99 · 2023-06-23 · in Analyzing New Unique Identifier Formats (UUIDv6, UUIDv7, and UUIDv8) (2022)
  3. …in multiple languages. there are 2 listed for js. https://github.com/aarondcohen/id128 and https://github.com/ulid/javascript
    comment by mgkimsal · 2021-01-22 · in Show HN: 128-bit, roughly-ordered, URL-safe UUIDs
  4. …caused by index page splitting (I wrote a ULID implementation for MSSQL that handles this). https://github.com/alizain/ulid
    comment by tatersolid · 2017-11-30 · in Auto increment is a terrible idea
  5. Does anyone use ULIDs [1] instead of UUIDs for stuff like this? I like that they're sortable. [1] https://github.com/alizain/ulid
    comment by gjem97 · 2017-11-30 · in Auto increment is a terrible idea
  6. …so this is my go-to when I'm making nonces if I am not worried about super-double-secure prngs. https://github.com/alizain/ulid
    comment by pfooti · 2017-09-12 · in Nano ID: A tiny, secure URL-friendly unique string ID generator for JavaScript
  7. …in the process. The simplest way to do that is to just throw UUID at all problems from the start. ( https://github.com/alizain/ulid s are better, but there aren't libraries to generate them in literally every language + RDBMS.)
    comment by derefr · 2017-06-12 · in Chess.com stopped working on 32bit iPads because 2^31 games have been played
  8. …I need IDs that are time-sortable while still retaining the advantages of a UUID. Read more here: https://github.com/alizain/ulid The ultra-quick summary: 48 bits of timestamp followed by 80 bits of randomness. Also, when representing as…
    comment by jdcarter · 2017-06-09 · in Be Careful with UUID or GUID as Primary Keys
  9. …to yours has a list that includes the one you mentioned and several others in various languages :) https://github.com/alizain/ulid#implementations-in-other-lan...
    comment by eriknstr · 2017-06-08 · in A Brief History of the UUID
  10. There's also "ULID" in this neo-UUID space: https://github.com/alizain/ulid 48-bit timestamp plus 80 bits randomness, base32 encoding (no hyphens), and lexicographic sort order.
    comment by mappu · 2017-06-07 · in A Brief History of the UUID
  11. …with using ulid identifiers, which won't face timestamp issues until around 10900 AD. Source here: https://github.com/alizain/ulid/
    comment by grawlinson · 2017-06-07 · in A Brief History of the UUID
  12. My guess is that the README was mostly copied from here: https://github.com/alizain/ulid Which has a similar list, but presents them as features/facts, not advantages. Edit: Perhaps it was noted to specifically call out that it maintains…
    comment by tyingq · 2016-12-06 · in Universally Unique Lexicographically Sortable Identifier in Go