[ lots of opinions about depending on symlinks for tablespaces ]
One thing that I think hasn't been noted in this thread is that our
initial implementation won't bind us forever. If it becomes clear that
a symlink-based implementation has real problems, we can change it.
But if we spend extra effort to avoid symlinks from the start, we will
never know whether that effort was justified or wasted.
We have enough work to do to make tablespaces happen that I feel we
should take the path of least resistance to start with. I do not think
it would cost us much wasted effort if the decision proves out wrong.
regards, tom lane