They’re also incredibly cheap to create & don’t need knowledge of each other. I mostly see batching of IDs like this when a lock is involved to prevent collisions & maintain performance.
With UUIDv7, you are reasonably sure that there won’t be collisions (check your use-case first), and can just generate them wherever on-demand (no locks required).
I’d argue batching IDs is actually more complicated than UUIDv7 for most use-cases.
This was a solution to the UUIDv7 problem of being time-dependend and therefore may leak information. Create the UUIDv7 in advance by batch of 10,000, use these randomly, and you fix that problem.
