From: | Bruce Momjian <bruce(at)momjian(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Jeff Davis <pgsql(at)j-davis(dot)com>, Brian Pitts <bdp(at)uga(dot)edu>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Ignore lost+found when checking if a directory is empty |
Date: | 2011-08-14 02:23:36 |
Message-ID: | 201108140223.p7E2NaJ24955@momjian.us |
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Lists: | pgsql-hackers |
Tom Lane wrote:
> Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> > Excerpts from Jeff Davis's message of mar ago 09 16:03:26 -0400 2011:
> >> I think I agree with Peter here that it's not a very good idea, and I
> >> don't see a big upside. With tablespaces it seems to make a little bit
> >> more sense, but I'd still lean away from that idea.
>
> > What if the init script tries to start postmaster before the filesystems
> > are mounted? ISTM requiring a subdir is a good sanity check that the
> > system is ready to run. Not creating stuff directly on the mountpoint
> > ensures consistency.
>
> I went looking in the archives for previous discussions of this idea.
> Most of them seem to focus on tablespaces rather than the primary data
> directory, but the objections to doing it are pretty much the same
FYI, the 9.0+ code will create a subdirectory under the tablespace
directory named after the catversion number, and it doesn't check that
the directory is empty, particularly so pg_upgrade can do its magic.
So, I believe lost+found would work in such a case, but again, the
security issues are real.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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