ulid
ksuid
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ulid | ksuid | |
---|---|---|
4 | 2 | |
644 | 41 | |
- | - | |
0.0 | 0.0 | |
about 1 year ago | over 2 years ago | |
Python | Java | |
Apache License 2.0 | GNU General Public License v3.0 or later |
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ulid
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Plan B for UUIDs: double AES-128
I really like ULID for this problem (e.g: https://github.com/ahawker/ulid)
- same number of bytes as UUID
- start with a date, so has great locality. Plus you get extra information in the uid that you can extract.
- can be created from an existing date or uuid, and exported to a uuid, so there is a migration path
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New UUID Formats from IETF
As the author of a popular ULID implementation in python[1], the spec has no stewardship anymore. The specification repo[2] has plenty of open issues and no real guidance or communication beyond language implementation authors discussing corner cases. The monotonic functionality is ambiguous (at best) and is implemented differently per-languages [3].
Functionality, UUIDv7 might be the _same_ but the hope would be for a more rigid specification for interoperability.
[1]: https://github.com/ahawker/ulid
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Sortable Collision-Free UUIDs
Looks similar to ULID[0] (I am the author of a popular python implementation[1]).
It appears to have a similar constraint that two ID's generated within the same timestamp (ms, ns) have no strong guarantee of ordering. That might not be a deal breaker depending on your use case but something to consider.
- Usando ULIDs para criar ordem em dados não ordenados
ksuid
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ksuid VS ksuid-creator - a user suggested alternative
2 projects | 26 Sep 2021
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Sortable Collision-Free UUIDs
I started looking into TSID/KSUID/ULID in order to support cursor based pagination schemes in GraphQL against non-integer based unique id fields (such as uuids or unique string ids).
A couple of notable Java libs:
https://github.com/f4b6a3/ulid-creator
What are some alternatives?
ksuid - K-Sortable Globally Unique IDs
uuid - Generate RFC-compliant UUIDs in JavaScript
python-ulid - ULID implementation for Python
UUID - :snowflake: A PHP library for generating universally unique identifiers (UUIDs).
ksuid-creator - A Java library for generating KSUIDs (K-Sortable Unique Identifier).
tsid-creator - A Java library for generating Time-Sorted Unique Identifiers (TSID).
EXREX - Irregular methods on regular expressions
spec - The canonical spec for ulid
xeger - Library to generate random strings from regular expressions.
ulid-creator - A Java library for generating Universally Unique Lexicographically Sortable Identifiers (ULID)