[6055] in Kerberos
Re: AFS-aware IMAP daemon?
daemon@ATHENA.MIT.EDU (Trey Harris)
Thu Oct 26 12:57:34 1995
To: kerberos@MIT.EDU
Date: 26 Oct 1995 15:43:12 GMT
From: harris@email.unc.edu (Trey Harris)
In article <46mgql$krc@news.duke.edu>, Michael Grubb <mg@ac.duke.edu> wrote:
>If you use the Cyrus imapd, your users should not be logging in to the IMAP
>server, and your users' login sessions on other machines should have no
>effect on authentication of the imapd processes. A fortiori, the Cyrus
>imapd handles all folders on local disk. Trying to wedge that into AFS
>would be a supremely bad idea.
I don't know if "wedge" is the proper word. This is unfortunately a
drop-dead issue if I can't get IMAPd to work with AFS, though, and if they
won't work together then I need to know so that I can cancel this project
and rework (we're supposed to sign the contract tomorrow!).
The reason this is a drop-dead issue is that this system is primarily (as
far as the chancellorial-level management cares, exclusively) for email.
Users get an X-megabyte quota for their use of *everything*.
Trying to segregate users' diskspace into two pieces (mail folder space
for mail use, home directory for other use) presents two problems which
are politically unsolvable.
First, how to break down the ten megabyte quota into mail use and other
use? From the upper management, the answer would be clear: ten megabytes
for mail use and zero for other use. That's not very practical, but
enough people use our machine that way (*never* logging in and *always*
using IMAP clients) to where it would make sense for some users. For some
of our web-publishing users, the answer would be one megabytes mail and
nine megabytes other, or ten megabytes other and none for mail.
Second, no matter how you break it down, what's the point of going to AFS
in the first place if the majority of user disk usage is going to have to
remain in UFS? We're hitting NFS scalability problems big time right now,
and our environment won't let us go to multiple IMAP servers until
IMAP4/IMSP redirection support is there; we need to put mail folders in
the user home directories to maintain the transparency that our users
take for granted.
--
Trey Harris http://sunsite.unc.edu/harris/
System Administrator, Project Isis, Office of Information Technology
The University of North Carolina at Chapel Hill
