Erlang: specify working directory for mnesia?

Question

How to specify a working directory for mnesia without resorting to passing the "dir" parameter on the command line?

In other words, can I specify a "working directory" for mnesia just before calling `mnesia: start () '?

Answer 1

application:set_env(mnesia, dir, Dir).

Answer 2

In addition to calling the method mentioned in other answers, here you can also specify this in the system configuration file or in the .app file specified by the -config parameter. See http://erlang.org/doc/design_principles/applications.html#id2270704 for more details. This allows you to save the configuration separately from the code and avoid a large number of command line flags.