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Date:      Wed, 28 May 2008 12:07:30 +0200
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        Tim Kientzle <kientzle@freebsd.org>
Cc:        cvs-src@freebsd.org, Alfred Perlstein <alfred@freebsd.org>, src-committers@freebsd.org, Diomidis Spinellis <dds@freebsd.org>, cvs-all@freebsd.org
Subject:   Re: cvs commit: src/tools/regression/bin/mv regress.sh
Message-ID:  <20080528100730.GA1354@garage.freebsd.pl>
In-Reply-To: <47DE8BEE.7040405@freebsd.org>
References:  <200712180849.lBI8nmEi088947@repoman.freebsd.org> <20071218100355.GR16982@elvis.mu.org> <20080314223652.GA20470@garage.freebsd.pl> <47DE8BEE.7040405@freebsd.org>

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On Mon, Mar 17, 2008 at 08:19:10AM -0700, Tim Kientzle wrote:
> >>> FreeBSD src repository
> >>>
> >>> Modified files:
> >>>   tools/regression/bin/mv regress.sh=20
> >>> Log:
> >>> Add more tests.  All rename(2)-based tests now succeed.
> >>> The performance of the cross-device equivalents is under investigatio=
n.
> >
> >I was thinking about adding two options to cp(1) (-1 and -2) to give
> >cp(1) a hint if the copy is done inside one disk or between separate
> >disks.
>=20
> Will anyone ever use such a flag?  I'm skeptical.

I would... sometimes:) That's probably why I never did it.

> If there were a way to determine this programmatically,
> it would be a big win.  You'd need to look at the first
> file copied to determine if the destination was on the
> same (physical) disk or not.

This is how I started to think about that, but this is not possible.
Moreover you may still want to use -2 option even if this looks like one
physical disk, but it represents a RAID5 array.

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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