UUID as entry_id ?

[nelsonic]

At present we are using a Random UUID for entry_id

entry_id: Ecto.UUID.generate()

see: /lib/alog.ex#L269

This is good in that it is "globally unique".
But is it the most effective unique ID we could be using?

[njwest]

Thanks for this phenomenal append-only log example!

PostgreSQL has a UUID type that only takes up 16 bytes (much less than UUID as string) and is supported by Ecto:

Migration:

add :entry_id, :uuid

Schema:

field :entry_id, Ecto.UUID

Was string chosen for UUID storage for a particular reason?

[nelsonic]

@njwest thanks for sharing. I hadn’t spotted the PgSQL UUID Type. Good to know. 👍🏻