uuid6-ietf-draft
ksuid
| uuid6-ietf-draft | ksuid | |
|---|---|---|
| 7 | 38 | |
| 182 | 4,691 | |
| 1.1% | 1.0% | |
| 5.7 | 3.1 | |
| 6 months ago | 7 months ago | |
| HTML | Go | |
| - | MIT License |
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uuid6-ietf-draft
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The UX of UUIDs
https://github.com/uuid6/uuid6-ietf-draft/issues/27
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This is very cool! I love this solution for ID’s what do you all think?
Why not UUIDv7?
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UUIDs Are Bad for Database Index Performance, enter UUID7!
What if a new UUID version could be designed that would take the randomness of UUID4 and combine it with a timestamp prefix? This would make the UUID increase overall, but not locally – due to the random postfix. The random part ensures uniqueness when a high generation rate is necessary and also makes the UUIDs hard to predict – it’s not possible to guess the previous, or next UUID. It’s fairly simple to devise a custom UUID scheme, but fortunately, there is a new Internet-Draft (at the time of writing) defining new pseudo-sequential UUID versions that aim to solve exactly this issue: draft-peabody-dispatch-new-uuid-format-04. The current state and progress can be viewed at IETF Datatracker.
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Understanding UUIDs, ULIDs and String Representations
Brad Peabody did the original -00 draft, which was discussed as an FYI at an IEFT meeting in March 2020. See [1], around 50 lines from the bottom.
Kyzer Davis has since submitted two further revisions -01 and -02 in April and October 2021. See history in [2].
The current -02 draft is due to expire in April 2022. Presumably Kyzer Davis will try to get it discussed before then.
The GitHub repo tracking these drafts is https://github.com/uuid6/uuid6-ietf-draft/.
[1] https://datatracker.ietf.org/meeting/107/materials/minutes-1...
[2] https://datatracker.ietf.org/doc/draft-peabody-dispatch-new-...
- UUID version 7. It's binary sortable and has many other advantages. Created specifically for modern distributed systems. IETF draft is published, they mid tweaking before publishing v3 draft.
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New UUID Formats – IETF Draft
At the moment anyway, that XML link won't render per an XML parsing error. For anyone who wants a quick look at what these XML docs look like here's one for UUID6 [0].
[0] https://github.com/uuid6/uuid6-ietf-draft/blob/master/draft-...
ksuid
- What happens after 100 years?
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Zero Downtime Postgres Upgrades
OP here - we avoid sequences in all but one part of our application due to a dependency. We use [KSUIDs][1] and UUID v4 in various places. This one "gotcha" applies to any sequence, so it's worth calling out as general advice when running a migration like this.
[1]: https://segment.com/blog/a-brief-history-of-the-uuid/
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Bye Sequence, Hello UUIDv7
UUID v4 isn't large enough to prevent collisions, that is why segment.io created https://github.com/segmentio/ksuid which is 160bit vs the 128bit of a UUIDv4.
- You Don't Need UUID
- A Brief History of the UUID
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Type-safe, K-sortable, globally unique identifier inspired by Stripe IDs
Assuming you don't need to use UUIDv7 (or any UUID's) then https://github.com/segmentio/ksuid provides a much bigger keyspace. You could just append a string prefix if you wanted to namespace, but the chance of collisions of a KSUID is many times smaller than a UUID of any version.
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Unexpected downsides of UUID keys in PostgreSQL
KSUID's are have temporal-lexicographical order plus 128 bits of entropy, which is more than UUIDv4.
https://github.com/segmentio/ksuid
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UUIDs are so much better than autoincrementing ids and it's not even close
That's why you use ksuid (https://segment.com/blog/a-brief-history-of-the-uuid/) or, if you're willing to go with a draft spec you could go with the new UUID formats https://www.ietf.org/archive/id/draft-ietf-uuidrev-rfc4122bi...
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What Happened to UUIDv2?
Interesting in more history of UUIDs? Twilio Segment's blog has an amazing history lesson about how they came to be.
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Which UUID package do you use? and why?
I use the ksuid from segment. https://github.com/segmentio/ksuid
What are some alternatives?
uuid7 - UUID version 7, which are time-sortable (following the Peabody RFC4122 draft)
ulid - Universally Unique Lexicographically Sortable Identifier (ULID) in Python 3
Ulid - Fast .NET C# Implementation of ULID for .NET and Unity.
pg-ulid - ULID Functions for PostgreSQL
spec - The canonical spec for ulid
nanoid - A tiny (124 bytes), secure, URL-friendly, unique string ID generator for JavaScript
ulid-mssql - Implementation of ULID generator For Microsoft SQL Server
uulid.go - ULID-UUID compatibility library for generating and parsing ULIDs.
python-ksuid - A pure-Python KSUID implementation
shortuuid.rb - Convert UUIDs & numbers into space efficient and URL-safe Base62 strings, or any other alphabet.