Date: Thu, 2 Feb 95 03:21:34 EST From: ups@tree.com (Stephan Uphoff) To: freebsd-hackers@FreeBSD.org Cc: ups@tree.com Subject: Re: Am I dreaming? Message-ID: <9502020821.AA05341@tree.com>
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>> amd relies on NFS retransmissions for reliability. If it needs to do
>> something that isn't finished right away, it will just drop the
>> packet, start the operation, and let the kernel eventually time out
>I think the question was more one of how it get its mitts on user
>requests for files that aren't currently mounted.
>
> Jordan
In order to automout nfs filesystems you need a special filesystem
that sits in the path of file that the user requests.
When a user requests a file it passes through this filesystem.
The filesystem can at that point mount the remote filesystem.
Confused ? Me too - sorry I'm still on a jetlag :(
Maybe an example will help:
@@@@@
A directory contains auto-mountpoints
/auto
The use should be able to automount a:/home1 and B:/home2 as
/auto/home1 and /auto/home2.
The trick is:
/auto is a special filesystem (a special nfs server)
that is triggered by lookup request in the directory /auto
for home2.
It then mounts B:/home2 on /mnt_points/XXX (or whatever)
and the lookup resturns a symbolic link to /mnt_points/XXX
Normal NFS will now work with the remote filesystem
@@@@@
I hope that answers the questions.
There are actually two methods I know of - so if you are still
interested let me know and I'll try for a full explanation tomorrow
(when I'm not sleeptyping)
Stephan
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