At Tue, 10 Apr 2007 06:56:43 -0500, Nestor A. Diaz wrote: Subject: Recomendations for a 15000 Cyrus Mailboxes > > These are the plans: (comments on every number will be apreciated) > > 1. Linux LVM over a 600 GB RAID 10 ( 4 x 300 GB) I would only ever be able to recommend NetBSD or FreeBSD, and I would strongly recommend some form of external RAID controller, either SCSI or Fibre Channel attached. > 2. Which filesystem seems to be the better ? ext3 ? xfs ? reiserfs ? FFS, or maybe FFSv2 :-) > 3. Which options to format the filesystem ? acording to the chosed > filesystem 2K fragments on FFS would be OK. > 4. Which pop3 / imap proxy to use ? Proxy? What for? > 5. Single instance or multiple instances of cyrus ? taking in mind > that there should be the option to recover a mailbox or some mail > of a mailbox without having to shut down the whole cyrus system. Single instance for Cyrus, but with a separate MX host that can be (quickly and easily) replicated and which does delivery via LMTP/TCP. That's far too small a system to justify the complexity of having to manage multiple systems. Recovery of an individual mailbox can usually be done safely without shutdown I think, though it might be good to be able to pause delivery for that specific mailbox, and of course make sure the user isn't signed on to access it either. I'm not sure how to pause delivery for an individual mailbox with Postfix, but one idea would be to simply have the MX host return a temporary SMTP error (e.g. 451), and make sure there's nothing for that mailbox in the incoming queue either. > 6. Best way to perform backups ? LVM snapshots ? shutting down some > cyrus partitions ? RAID10 hot swap ? If you use FFSv2 snapshots then you'd probably be OK doing an rsync of the snapsot to another (preferably off-site) backup host. Perhaps you would want to use rdiff-backup, though a plain rsync should be sufficient for mailboxes. -- Greg A. Woods H:+1 416 218-0098 W:+1 416 489-5852 x122 VE3TCP RoboHack <woods@xxxxxxxxxxx> Planix, Inc. <woods@xxxxxxxxxx> Secrets of the Weird <woods@xxxxxxxxx> ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
