I prefer encoded GUID generators like: pid, memory location, machine hardware ID, UTC epoch date-time, back-patched hash( serialized object, and salt) Guarante

I prefer encoded GUID generators like: pid, memory location, machine hardware ID, UTC epoch date-time, back-patched hash( serialized object, and salt) Guaranteed globally unique in concurrency, built in data integrity check, and non-blocking read-modify-Bork resistant error detection You are welcome, =)