Hi Jami,
Charles replied to me about your answer on the dev list. I must have missed your answer.
My only reference point is what we currently have on servers and applications. Which are one backend server (dual CPU, 4 GB memory) with Cyrus and the mailboxes (maildir style) and one frontend server (dual CPU, 1GB memory) with IMP 3.1. This setup performs really good.
We are planning a few upgrades. First we will upgrade the backend to a quad core CPU with 8 GB RAM and storage will now not be located on local disks but on a SAN. We expect that the new backend will perform awesome with these specs. After the upgrade, we plan to enlarge the mailboxes. The current quota is 25 MB per mailbox. We're thinking about 1 GB per mailbox (no problem with our SAN). This increase should not affect backend performance.
After the backend upgrade, we'd like to upgrade the front end with a new webmail client that needs less change in code to integrate. (IMP needs a lot more tweaking than RC). I've read several posts about bad performance with RC on large mailboxes (over 2000 mails in one folder) and with a large folder list. Bottomline is that RC performs well when you have a small mailbox with not too much emails (about 100). If we increase the size of the mailboxes, that would also increase the time needed for the webmail client to present the mailbox list (with seen/unseen messages) and the contents.
What I'm interested in is:
- how much mailboxes does RC serve at your Campus?
- how much simultaneous IMAP connections do you usually see (peak), with
the use of an imap proxy (we use that as well)?
- how is the server setup? is that similar to ours?
- have you used any form of caching or load balancing with RC (2 front
end servers, MySQL message caching feature of RC?)?
- which version of RC are you using at the moment? The RC2 or the stable
version?
I hope you can help me with some info.
Thanks in advance,
Br.
Dennis
-------- Original Message -------- Subject: Re: [RCU] any info on performance on large sites? Date: Wed, 9 Apr 2008 17:24:21 -0500 From: chasd chasd@silveroaks.com To: Dennis Ortsen dortsen@gmail.com References: 47FBAFEA.8080503@gmail.com 6039A7FF-6531-4C76-B903-3B1965B2D8CA@silveroaks.com 47FD3732.8080902@gmail.com
I contacted someone at Maine University. The IT group seems quite
large and not centrally organised. There are 7 campus sites. I'm
told there are rumors that one campus is looking at or using
Roundcube, but no one really seems to know which campus. They
suggested that I'd ask the person who gave me that tip (that's
you ;-) if you know which campus your nephew is going to. They
might direct me to the right person with that information.
I'm replying as a PM because it seems we are the only ones communicating, and it isn't a subject that impacts most users. If you feel the Users list should get a copy, let me know and I can re-send.
I posted my first reply to both the Users list and the Developers list since you addressed your original message to both lists. I thought you would have seen the reply from someone at UMaine Farmington on the devel list. Since you seem to have missed it, Ill quote it here :
Hi all, I rolled out Roundcube on our Farmington Campus intranet last
summer. To my knowledge this is not being used by other UMaine
campuses. I had to tweak the login code to meld with our existing
authentication process. The most notable bump in the road was our
need for an imap proxy. The system was getting very high IMAP
connection rates. Once we started using the imap proxy, all worked
pretty well.What kind of solid info are you looking for?
Jami
That message was from Jami Holmes, and his e-mail address is
jholmes@maine.edu
if you would want to contact him off list. If you subscribe to the Devel list, you might want to look in your spam quarantine or something that would have caused you to miss that message from the 8th.
HTH,
Charles Dostale System Admin - Silver Oaks Communications http://www.silveroaks.com/ 824 17th Street, Moline IL 61265
List info: http://lists.roundcube.net/dev/