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Re: pg_restore fails with a custom backup file

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Magnus Hagander <magnus(at)hagander(dot)net>
Cc: Hiroshi Saito <z-saito(at)guitar(dot)ocn(dot)ne(dot)jp>, pgsql-hackers(at)postgresql(dot)org, Yoshiyuki Asaba <y-asaba(at)sraoss(dot)co(dot)jp>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: pg_restore fails with a custom backup file
Date: 2007-02-01 19:14:07
Message-ID: 200702011914.l11JE7Q09201@momjian.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Thread URL added to TODO item:

        o Add long file support for binary pg_dump output


---------------------------------------------------------------------------

Magnus Hagander wrote:
> On Fri, Dec 15, 2006 at 12:57:50AM +0900, Hiroshi Saito wrote:
> > 
> > >Win32 does not implement fseeko() and ftello(). So I think it limit to
> > >handle a 2GB file. Is this a specification?
> > 
> > Yes, Magnus-san suggested the problem. It is present TODO.  The entire 
> > adjustment was still difficult though I had tried it. SetFilePointer might 
> > be able to be saved. However, I think it might be an attempt of 8.3...
> 
> I've been looking at a fix for this, and I think I have it. The solution
> looks to be to redefine off_t to 64-bit (the standard headers *always*
> define it as 32-bit, and there is no way to change that - at least not
> that I can find).
> 
> I have the fix made for just bin/pg_dump for now (in pg_dump.h), and I'm
> testing that. (So far only on MSVC builds)
> 
> A question though - is there any *gain* from using 64-bit offsets in the
> actual backend? The change could of course be done in port.h, but that
> will affect the whole backend (and require a few more functions than
> just fseeko/ftello to be redefined) which could have larger
> consequences.
> 
> So - provided that this works after my test is completed, is the better
> place to do this for just pg_dump/pg_restore, or attempt to do it for
> the whole backend?
> 
> //Magnus
> 
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-- 
  Bruce Momjian   bruce(at)momjian(dot)us
  EnterpriseDB    http://www.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +

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