From: "Tom Lane" <tgl@sss.pgh.pa.us>
> "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.
Thank you, I've understood the reason for placement. As I supposed,
it is provided mainly for placing config files in /etc to allow
frequent backup of the configuration as a whole system, because most
config files of UNIX are stored in /etc (recommended so in FHS) and
/etc is small.
