Show HN: SnowId – A Decentralized, K-Ordered, 128-bit UUID library in C

15 points by beyonddream 2 years ago | 6 comments
Sharing my project inspired by twitter snowflake UUID generator but that supports:

1) Longer range of id's to be generated.

2) No coordination with other machines in the distributed system.

  • lijogdfljk 2 years ago
    Possibly a tangent, but what is the "dot notation" described in:

        # hexadecimal representation of 128-bit id's in dot notation
    0:0:1:84:40:9b:ff:a5:2:0:12:ac:42:3:0:0
    • beyonddream 2 years ago
      Good eye! That was a typo. It should read as "colon notation". It is just a visual representation of 128 bits (16 bytes) with each byte separated by colon ":". I have updated the readme with an example. One place where you will see this notation visually is MAC addresses.
    • orf 2 years ago
      Why use this over the new ordered UUID RFC?
      • beyonddream 2 years ago
        UUID RFC use <timestamp, sequence, node id> layout which is different from the layout of snowid scheme which is <timestamp, node id, sequence>. Also UUID RFC timestamp can only use up-to 60 bits whereas snowid has the full 64 bits to spare. They server different use-cases.
      • __ryan__ 2 years ago
        Show an example of the generated id.