Re: Big 7.1 open items

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Jan Wieck <JanWieck(at)Yahoo(dot)com>, Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, "Ross J(dot) Reedstrom" <reedstrm(at)rice(dot)edu>
Subject: Re: Big 7.1 open items
Date: 2000-06-21 04:06:42
Message-ID: 2999.961560402@sss.pgh.pa.us
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Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> I recommend making a dbname in each directory, then putting the
> location inside there.

This still seems backwards to me. Why is it better than tablespace
directory inside database directory?

One significant problem with it is that there's no longer (AFAICS)
a "default" per-database directory that corresponds to the current
working directory of backends running in that database. Thus,
for example, it's not immediately clear where temporary files and
backend core-dump files will end up. Also, you've just added an
essential extra level (if not two) to the pathnames that backends will
use to address files.

There is a great deal to be said for
..../database/tablespace/filename
where .../database/ is the working directory of a backend running in
that database, so that the relative pathname used by that backend to
get to a table is just tablespace/filename. I fail to see any advantage
in reversing the pathname order. If you see one, enlighten me.

regards, tom lane

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