tsid-creator
ulid
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| tsid-creator | ulid | |
|---|---|---|
| 3 | 4 | |
| 409 | 644 | |
| 6.8% | - | |
| 6.9 | 0.0 | |
| 28 days ago | about 1 year ago | |
| Java | Python | |
| MIT License | Apache License 2.0 |
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tsid-creator
- TSID Creator: A Java Library for Generating Time-Sorted Unique Identifiers
- TSID Creator: A Java library for generating Time-Sorted Unique Identifiers (TSID).
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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
https://github.com/f4b6a3/tsid-creator
https://github.com/akhawaja/ksuid
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
[2]: https://github.com/ulid/spec
[3]: https://github.com/ulid/spec/issues/11
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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.
* https://github.com/ulid/spec
* https://github.com/ahawker/ulid
- Usando ULIDs para criar ordem em dados não ordenados
What are some alternatives?
ulid-creator - A Java library for generating Universally Unique Lexicographically Sortable Identifiers (ULID)
ksuid - K-Sortable Globally Unique IDs
uuid-creator - A UUID library for Java.
python-ulid - ULID implementation for Python
ksuid - Java implementation of K-Sortable Globally Unique IDs
uuid - Generate RFC-compliant UUIDs in JavaScript
jnanoid - A unique string ID generator for Java.
UUID - :snowflake: A PHP library for generating universally unique identifiers (UUIDs).
EXREX - Irregular methods on regular expressions
simpleflake - Distributed ID generation in python for the lazy.
xeger - Library to generate random strings from regular expressions.