[OpenAFS] Big Initial Question about OpenAFS

Todd M. Lewis Todd_Lewis@unc.edu
Mon, 19 Mar 2007 16:06:45 -0400

I'm afraid you're going to be disappointed, unless you have only one 
OpenAFS server. The OpenAFS clients communicate with whichever server(s) 
house the volumes they are trying to use. Volumes contain what looks 
like a directory of subtrees with files, directories, and symbolic 
links, but they can also contain mountpoints (which look like 
directories) for other volumes in the same or other cells. Those other 
volumes may well be on other servers (and certainly will be if they are 
out of the parent volume's cell, as a server can only serve one cell). 
Yes, this means that a given volume can be "mounted" (referenced as a 
subtree really) from multiple places. Try not to make loops, 'kay.

Robinson, Eric wrote:
> Network connectivity differs significantly between NFS and Samba. With 
> CIFS/Samba, shares may participate in a DFS tree and appear to the 
> client as a single unified tree. However, when the client actually 
> connects to a resource, he is redirected to the IP address of the server 
> that holds the resource, so he ends up communicating with multiple 
> hosts. With NFS, a server mounts the remote filesystem(s) and the client 
> communicates only with one machine.
> Which is OpenAFS more like? I am hoping it  is more like NFS because I 
> have to work around firewall limitations. I am hoping that I can 
> communicate solely with the OpenAFS server, and it will in turn 
> communicate with other servers that it has mounted. Is that the way it 
> works?
> --
> Eric Robinson
> Director of Information Technology
> Physician Select Management, LLC
> 775.720.2082
> Disclaimer - March 14, 2007
> This email and any files transmitted with it are confidential and 
> intended solely for *openafs-info@openafs.org*. If you are not the named 
> addressee you should not disseminate, distribute, copy or alter this 
> email. Any views or opinions presented in this email are solely those of 
> the author. Warning: Although the message sender has taken reasonable 
> precautions to ensure no viruses are present in this email, neither 
> Physician Select Management nor Physician's Managed Care can accept 
> responsibility for any loss or damage arising from the use of this email 
> or attachments.

   / Todd_Lewis@unc.edu  919-445-9302  http://www.unc.edu/~utoddl /
  /     A bicycle can't stand alone because it is two-tired.     /