1. How to implement GUID With Python
charsyam@naver.com

2. GUID?

3. Unique ID

4. When you need Unique ID?

5. User ID?

6. User ID?
Service ID?

7. User ID?
Service ID?
Event ID?

8. Example

9. A Long Long Time Ago

10. Mac Address?

11. Device ID?

12. So, we need
Unique ID!!!

13. UUID

14. Universally
Unique ID

15. Universally
Unique ID
RFC 4122

16. 550e8400-e20b-41d4-a716-446655440000

17. 16 Octet (128bit)

18. SHA-1(MAC+Time)

19. BUT …

20. BUT …
BUT …

21. BUT …
BUT …
BUT …

22. UUID is not good
For Some Services

23. Why?

24. Too Big

25. Can’t order by
Time

26. How to get these attributes!!

27. Research
Just Google it.

28. MongoDB

29. Instagram

30. Twitter
SnowFlake

31. MongoDB
12 Bytes
BSON Object

32. MongoDB

33. Instagram
64 bits

34. Instagram

35. Instagram
Logical Shard
Physical Shard

36. Slowflake
64 bits

37. Snowflake

38. Snowflake
Zookeeper

39. Python-Guoid
import guoid guid = guoid.SnowFlake(datacenter_id, worker_id) guid.next()

40. Python-Guoid
https://github.com/charsyam/python-guoid

41. Python-Guoid
Not service
Just Library

42. Python-Guoid
How to get
Datacenter_id
Worker_id

43. Thank you!