> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:squirrelmail- > [EMAIL PROTECTED] On Behalf Of John Madden > Sent: Thursday, May 12, 2005 4:37 PM > To: email builder > Cc: [email protected]; email builder > Subject: Re: [SM-USERS] Re: Load Balancing and session side effect > > > We are a small biz that wants to start implementing clustering of our > > services, but not sure if LVS is necessary just yet. We are starting > with > > just two boxes with both HTTPD/SquirrelMail and MTA/IMAP on both boxes > with > > NFS-based backend on a 3rd machine. We'll put all mail spools and SM > data > > dirs and PHP sessions (file-based) on the NFS machine. > > > > Our question is if there will be any problems to consider starting out > with > > a DNS round-robin load balancing instead of more complex LVS stuff? > > I suggest that you not store your mail spools on NFS. Do IMAP over the > network to > a load-balanced imapd if you want (with GFS on shared scsi/san storage), > but for > heaven's sake, don't point your imapd at an NFS export.
What is your technical reason for this suggestion and admonition? I've been storing mail on NFS servers successfully for almost 10 years now with tens of thousands of active users. I've not experienced any problems yet and I don't expect to. > Your IMAP server shouldn't need to be load balanced anyway, so you could > take that > complication out of the picture if you want. Load balancing an MTA via I'm guessing you haven't had the need for active or passive redundancy and near 100% uptime. What if he has more users than one machine can support? > DNS (not > using MX records) seems to be asking for trouble too, although I can't put > my > finger on why. If a server is down the DNS RR will still redirect users to it. -- Marc ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_ids93&alloc_id281&op=click -- squirrelmail-users mailing list Posting Guidelines: http://squirrelmail.org/wiki/wiki.php?MailingListPostingGuidelines List Address: [email protected] List Archives: http://news.gmane.org/thread.php?group=gmane.mail.squirrelmail.user List Archives: http://sourceforge.net/mailarchive/forum.php?forum_id)95 List Info: https://lists.sourceforge.net/lists/listinfo/squirrelmail-users
