*BSD News Article 62104


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From: csdayton+usenet@midway.uchicago.edu (Soren Dayton)
Subject: Re: NFS question( sharing /var/mail and/or /usr/spool/news).
In-Reply-To: rashid@rk.ios.com's message of 18 Feb 1996 16:08:49 GMT
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To: rashid@rk.ios.com (Rashid  Karimov)
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Date: Mon, 19 Feb 1996 05:23:17 GMT

Our friend, rashid@rk.ios.com (Rashid  Karimov), wrote:

> 	Will it be fast enough ( the thing should serve ~20.000 - 50.000
> 	e-mail accounts), will there be problems with locking
> 	mail-boxes for delivery and reading ,

  There always is.  The only real hope for locking is to do as much as
possible.  Procmail (version 3.11pre4.  The 3.11 prereleases are the
first ones to be functional on a 4.4 BSD platform) can take care of
_some_ of this, but this is still really dangerous.  It might be worth
seeing hoe much you can do with IMAP/pop.  Pine supports IMAP.  MH,
emacs user agents, and a couple of other things support pop.  This
leaves elm, mail, and mush (I think) that still give you problems.  This
is a much cleaner solution.  You can probably make it all relatively
secure by using ssh to proxy connections between machines too.

>                                        what's gonna happen
> 	to the network , it there a sense in using 100Mb Ethernet.
> 
> 	Is the idea usable at all for this amount of users ???
 
  There are a lot of factors.  Things like the software used (you
probably want all of the software to take the stuff _out_ of the spool
for example.  This just pushes luck with file locking even more). 
 
> 	Any ther newtworked file system to be used instead of NFS :)) ?

  None that are free :)

Soren