> but also how they're constructed (MAC address, timestamp, and a random element).
Who uses UUID1? The vast majority are UUID4 and they are pure random.
Who uses UUID1? The vast majority are UUID4 and they are pure random.
Specifically with Postgres I use the v1mc version as it provides the added benefit of using "a random multicast MAC address instead of the real MAC address of the computer"[0].
[0] http://www.postgresql.org/docs/9.4/static/uuid-ossp.html