Typically, in the SQL world we use things like AUTO_INCREMENT columns that let us create a unique key automatically if a row is inserted into a table.

What do you guys usually do to create identifiers for use in Cassandra?

Do we only rely on "currentTimeMills() + random()" to create something that is 'unique enough' (but theoretically not fail-safe)? Or are some people here using systems like ZooKeeper for this purpose?