UUID and database primary key

Enterprise 2023-12-17 19:06:17 views: null

UUID

uuid is a string randomly generated by network card MAC address, timestamp, namespace, random or pseudo-random number, timing and other factors. There are 128 bits, and the coincidence probability is 2 to the 128th power.

Unique

I suddenly thought of using uuid as the primary key of the database.

Can guarantee global uniqueness
Can be generated in a distributed manner
Unordered insertion can avoid lock contention
You can't guess it, it's safe
Easy to merge and migrate

But there are also some problems

Large storage overhead
The performance is not as high as the auto-increment ID
Manually searching data based on id is difficult
The generation efficiency may be poor
Creation order cannot be determined by id

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Origin blog.csdn.net/majiayu000/article/details/132491114

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