"Takayuki Tsunakawa" <tsunakawa.takay@jp.fujitsu.com> writes:
> Still, I don't understand well why config files need to be placed
> outside the data directory, except for daring conform to FHS.
The killer argument for it is that most of what is in $PGDATA should be
excluded from your normal filesystem backup method, because you need to
be using some database-aware mechanism for backing up the database. But
the config files are perfectly suited for standard filesystem backup,
and indeed will *not* be covered by, say, pg_dumpall. So putting them
somewhere else helps in creating a coherent backup strategy.
regards, tom lane