The Holy Grail Of Persistence?

One of the very first CTO-grade decision I had to take in the making of Snoget was to pick what would become our main transactional persistence engine. Since we're using Erlang exclusively for our production servers, the solution seemed easy: use Mnesia. But I settled for PostgreSQL. At this point, anyone who's been dealing with O/R mapping (like Ted Neward who said: "Object/relational mapping is

[rawwell]

Using a standard DB like PostgreSQL allowed us to leverage Ruby's ActiveRecord Migration, which is not only handy for migrating forward (as you do in production) but also backwards (as you sometimes have to do in development). Though Mnesia record evolution is possible, the fact that data migration