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Date:      Wed, 6 May 2020 16:31:26 -0400
From:      Aryeh Friedman <aryeh.friedman@gmail.com>
To:        Valeri Galtsev <galtsev@kicp.uchicago.edu>
Cc:        FreeBSD Mailing List <freebsd-questions@freebsd.org>
Subject:   Re: redesignde the unix-like system directory
Message-ID:  <CAGBxaXmO7EmHw6UOQWUp5gBu-89+fjTeyeK-NrWHxrg3rDOpqQ@mail.gmail.com>
In-Reply-To: <3f899735-1ed2-105c-1483-0450b8dcc7a3@kicp.uchicago.edu>
References:  <83788746a7d8a802d8af4b582e00827166febd1a.camel@tom.com> <CAEJNuHzCcqR0-v_SEPT4QWai1owzL_41M-YN3fTS_YGHN0jwFg@mail.gmail.com> <9a387b42-8da5-2968-24ba-754c3e461252@kicp.uchicago.edu> <20200506151230.GI82984@trajan.stk.cx> <c3f5a607-760d-8a85-c0f3-e72ee6b9a3dc@tundraware.com> <20200506134457056426360@bob.proulx.com> <3f899735-1ed2-105c-1483-0450b8dcc7a3@kicp.uchicago.edu>

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On Wed, May 6, 2020 at 4:19 PM Valeri Galtsev <galtsev@kicp.uchicago.edu>
wrote:

>
>
> On 5/6/20 2:55 PM, Bob Proulx wrote:
> > Tim Daneliuk wrote:
> >> Arne Steinkamm wrote:
> >>>>> /cloud, various cloud applications
> >>>>> /net,  network information and server information, etc.
> >>> Looking at a flat layout like this one gives me a feeling, that
> >>> most people forgot that it's a real bad idea to have a
> >>> external mounted directory in the root directory... easy way to make
> >>> a system unresponsive in case of a network problem.
> >>
> >> Can you say a bit more about why this is so?
> >
> > Assume NFS for simplicity.  A mount point at the /nfsmount1 directory.
> > Then run "ls -l /".  That needs to stat(2) each entry in / and hits
> > /nfsmount1
>
> Do people really do that? I kind of since forever use automounter or
> similar, net mounts are in subdirectories of
>
> /net
>
>
Yes all the time some programs even force it if you use them NFS mounted
such as devel/aegis if you want to have a centeral collection of baseline
for all developers to access.   Using /net in many situations (most I have
run into) is the *WEIRD* way not the mounting to  non-/net.  Luckily all
such programs I know of allow/encourage you not to do a direct mount on
root for reasons discussed,

>
> --
> ++++++++++++++++++++++++++++++++++++++++
> Valeri Galtsev
> Sr System Administrator
> Department of Astronomy and Astrophysics
> Kavli Institute for Cosmological Physics
> University of Chicago
> Phone: 773-702-4247
> ++++++++++++++++++++++++++++++++++++++++
> _______________________________________________
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>


-- 
Aryeh M. Friedman, Lead Developer, http://www.PetiteCloud.org



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