This was one of the neatest features of the computer formerly known as AS/400: each job (batch or interactive) had its own temporary library (QTEMP). You could create objects there knowing only you could see them, and the library was destroyed the moment the job ended. Definitely will try polyinstantiated directories.
What do you mean former? There is an AS/400 in our data centre that we look after for a customer for their off site DR box, with constant DB replication. It is about four years old, the platform is rather older. Bloody noisy beast especially on boot up (IPL?) sounds like a helicopter winding up. It was switched on after racking and that was it - I'm told it is simply available.
