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Date:      21 Nov 1999 01:01:29 +0100
From:      Assar Westerlund <assar@sics.se>
To:        Garance A Drosihn <drosih@rpi.edu>
Cc:        hackers@FreeBSD.ORG
Subject:   Re: Portable way to compare struct stat's?
Message-ID:  <5l1z9kn25i.fsf@foo.sics.se>
In-Reply-To: Garance A Drosihn's message of "Sat, 20 Nov 1999 16:43:04 -0500"
References:  <XFMail.991118185611.jdp@polstra.com> <3836DF98.9A84EC44@newsguy.com> <3836F873.D3B989FE@softweyr.com> <v04210107b45cb84c49f1@[128.113.24.47]>

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Garance A Drosihn <drosih@rpi.edu> writes:
> At 12:37 PM -0700 11/20/99, Wes Peters wrote:
> >It's not broken in this case.  2^16 (st_dev) is certainly enough to uniquely
> >indentify all mounted filesystems, and 2^32 is (by definition) enough to
> >uniquely indentify each of the files on a filesystem.

Why can't a file system have more than 2^32 files?

> Hmm, I'm not so sure.  In AFS land we have 162 different cells
> "in AFS".

Yeah, actually four 32-bit numbers identify all files in AFS-space
uniquely.  That would mean making `ino_t' be a 128-bit number.  Can
you say `long long long' ?  (I don't think it's practical to use more
than one device, and you would still need 112 bits).

/assar


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