Date: Tue, 17 Sep 1996 18:19:27 +0100 (GMT-1) From: af@biomath.jussieu.fr To: randyd@nconnect.net (Randy) Cc: freebsd-questions@freebsd.org Subject: Re: AMD difficulties Message-ID: <199609171719.SAA10525@garfield.biomath.jussieu.fr> In-Reply-To: <XFMail.960917101359.randyd@nconnect.net> from "Randy" at Sep 17, 96 10:06:08 am
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Randy wrote / a ecrit:
>
> Greetings,
>
> Again I wish to express my appreciation for your assistance. It worked
> like a charm on one of my networks...
De rien (you're welcome, in french)
> on the other I get a "permission denied"
> messages when I try to access the link. Both networks are pretty much
> identical.
It sounds like the server machine isn't exporting the directory
correctly... can you manually mount it from the client ?
Check the /etc/exports entry, check that the server can resolve the
client's node name.
> I must admit I don't at all understand what the entries in the
> amd.map file mean.... I'm looking for a way to get smart to that. I assume
> it's standard unix script?
As Sean Kelly pointed out, it's not. It's a configuration file with
a somewhat (!) involved syntax and variable expansion constructs which
indeed can make it look like a shell script.
Let's have a look at it (briefly). Someone correct me if I'm wrong.
/defaults type:=host;fs:=${autodir}/${rhost}/root/;rhost:=${key}
This line establishes global defaults:
. type:= host means that we're doing remote mounts through NFS
(as opposed to local filesystems mounts which can also be done
using amd -- ufs and such)
. fs:=... establishes how amd's mount point will be constructed
e.g. for a remote host called "foo" exporting a "/data" dir, amd's
mount point will be /a/foo/root/data
. rhost:=... means that the the key matched in the rule below will
actually be the host name to mount from
* host!=${key};opts:=rw,nosuid; \
host==${key};type:=link;fs:=/;
Those two lines mean that for anything (because * matches all) under
the directory specified for this map (/Net in the example I gave in my
previous mail), the following rules will be applied (note that the
"anything under the directory specified" is actually called the "key").
. if the local host name doesn't match the key name, then actually
do a NFS mount using the specified options
. if the local host name matches the key, then no need to go through
NFS, just do a link to the root of the local system
Then, on host "bar" /Net/bar will just point to /, and /Net/foo/data will
point to /a/foo/root/data which in turn will be a NFS mount point for
foo:/data (always for the example I gave of my local setup).
Hope this is not too obscure. Again, this is my humble understanding of amd.
_Alain_
--
Alain FAUCONNET Ingenieur systeme - System Manager AP-HP/SIM
Public Health 91 bld de l'Hopital 75013 PARIS FRANCE
Medical Computing Research Labs Mail: af@biomath.jussieu.fr
Tel: (+33) 1-40-77-96-19 Fax: (+33) 1-45-86-80-68
I've RTFMed. It says: "Refer to your system administrator"
But... I *am* the system administrator :-]
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