Time-Sorted Unique Identifiers (TSID).
- https://github.com/f4b6a3/tsid-creator
NanoID
- https://www.daleseo.com/nanoid/
snowflake
- ex) https://github.com/callicoder/java-snowflake
instagram
- 개인적으로 과거에 해당 방식으로 종종 개발
- https://instagram-engineering.com/sharding-ids-at-instagram-1cf5a71e5a5c