spec

The canonical spec for ulid (by ulid)

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NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a better spec alternative or higher similarity.

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spec reviews and mentions

Posts with mentions or reviews of spec. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2025-02-03.
  • 🔍 ULIDs: A Modern Identifier for Distributed Systems
    2 projects | dev.to | 3 Feb 2025
    In software development, identifiers are the backbone of data storage, retrieval, and system coordination. Whether you’re building a database, API, or distributed system, your choice of identifier scheme impacts performance, scalability, and reliability. Traditional options like auto-incrementing integers and UUIDs (Universally Unique Identifiers) have long dominated, but each comes with trade-offs. ULIDs (Universally Unique Lexicographically Sortable Identifiers) offer a modern alternative that combines the strengths of both approaches while avoiding their weaknesses. This article explains why ULIDs are gaining traction in distributed systems and how they solve real-world problems.
  • Postgres UUIDv7 and per-back end monotonicity
    4 projects | news.ycombinator.com | 2 Jan 2025
    My org has been using ULID[0] extensively for a few years, and generally we've been quite happy with it. After initially dabbing with a few implementations, I reimplemented the spec in Kotlin, and this has been working out quite well for us. We will open-source our implementation in the following weeks.

    ULID does specifically require generated IDs to be monotonically increasing as opposed to what the RFC for UUIDv7 states, which is a big deal IMHO.

    [0]: https://github.com/ulid/spec

  • UUID 🪪 or Auto Increment Integer / Serial ⚙️ as the Database Primary Key?
    2 projects | dev.to | 11 Nov 2024
    Bespoke solutions are invented to address the limitation of UUID including Snowflake ID, ulid, cuid. IETF also published a draft in April 2021 to propose a new UUID format. And in May 2024, IETF finally approved the draft. The approved UUIDv7 format:
  • ULID: Like UUID but Sortable
    8 projects | news.ycombinator.com | 13 Jul 2024
  • The UX of UUIDs
    10 projects | news.ycombinator.com | 11 Apr 2024
    Can use ULID to "fix" some issues

    https://github.com/ulid/spec

  • Ulid: Universally Unique Lexicographically Sortable Identifier
    1 project | news.ycombinator.com | 30 Mar 2024
  • Ask HN: Is it acceptable to use a date as a primary key for a table in Postgres?
    1 project | news.ycombinator.com | 28 Dec 2023
    Both ULID and UUID v7 have a time code component which can be extracted.

    It would be best for indexing to store the actual value in binary, though not strictly necessary as these later UUID standards (unlike conventional UUIDs) use time code prefixes (so indexing clusters.)

    https://uuid7.com/

    https://github.com/ulid/spec

  • Bye Sequence, Hello UUIDv7
    8 projects | news.ycombinator.com | 1 Oct 2023
  • 50 years later, is Two-Phase Locking the best we can do?
    1 project | news.ycombinator.com | 30 Sep 2023
    I'd love for Postgres to adopt ULID as a first class variant of the same basic 128bit wide binary optimized column type they use for UUIDs, but I don't expect they will, while its "popular" its not likely popular enough to have support for them to maintain it in the long run... Also the smart money ahead of time would have been for the ULID spec to sacrifice a few data bits to leave the version specifying sections of the bit field layout unused in the ULID binary spec (https://github.com/ulid/spec#binary-layout-and-byte-order) for the sake of future compatibility with "proper" UUIDs... Performing one big bulk bitfield modification to a PostgreSQL column would have been much less painful than re-computing appropriate UUIDv7 (or UUIDv8s for some reason) and then having to perform a primary key update on every row in the table.
  • FLaNK Stack Weekly for 12 September 2023
    26 projects | dev.to | 12 Sep 2023
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