Re: Ancient NFS patch sought

[Neil Brown]

On Sunday August 11, [e-mail] wrote:
> Greets,
> 
> I'm looking for a few terms that I can use to STFW with google, to find
> the patch (or code) for a wierd ancient NFS feature.
> 
> Many years ago I was using someone else's Linux box with NFS.  This
> version of NFS had the feature that:
> 
> On the server you could copy a file to it's own name followed by a '#'
> followed by the MAC address of one of the clients, and then that client
> would see this copy of the file as though it were the original.  The two
> files would typically be different, and the server and the client get
> their own versions each.  The process could be continued for any number
> of different clients.
> 
> Can anyone give me some search terms (or an URL) to help me find the
> code for this feature on the web?

ClusterNFS on sourceforge.  So
   http://clusternfs.sourceforge.net/

> 
> TIA,
> chippo
> 
> PS: What I really want to know (which I'll hopefully glean from the
> code/URL when located) is:
>  - was this a user-space or kernel-space implementation of NFS

UserSpace

>  - how much mission it'll be to get the same (or similar) functionality
> on a 2.4 kern.

Not if I can help it.  All the functionality you need already exists.

Each client mounts a common root filesystem.
A very early rc script mounts a per-client filesystem on
e.g. /perclient.
The rc script can use hostname or IP address or MAC address or
whatever it wants to choose the actual filesystem to mount:

   mount -t nfs -o nolocks server:/clientfilesys/`hostname` /perclient

Then any file that needs to be per-client becomes a symlink into
/perclient.

About the only thing that this doesn't work for is files the are
unlinked and re-created often.  I suspect if there are any of those
there is a workable solution.

NeilBrown

> 
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