You can use Heartbeat(http://linux-ha.org/download/) to automatically swich the services to other server and DRBD (http://www.complang.tuwien.ac.at/reisner/drbd/) to mirror the NFS volumes. So that's 2 times heartbeat and once drbd. That's how we make it here.
Lukas On Sat, 12 Jul 2003, [iso-8859-1] Lars Holmström wrote: > One of my options would be to provide a NFS mountpoint that I ca provide > via another cluster file system. > > Is it ok to have two courier boxes writing in to the same NFS mounted > disk ? > > If I undertsand the Linux world correct the clustered file system is the > key to build bullet proof solutions. Or is there a way to have two > courier boxes replicating each other, via rsync for example ? I do know > this is probably off topic, but still, having to deal with courier as an > application, how does people solve the problem ? > > /Lars > ----- Original Message ----- > From: Mitch (WebCob) > To: Lars Holmström ; [EMAIL PROTECTED] > Sent: Saturday, July 12, 2003 9:04 PM > Subject: RE: [courier-users] Disaster tolerant IMAP and SMTP ? > > > You've got a few things to look into Lars - this isn't really a > courier question... > > You need to look at distributed replicated storage systems (afs, coda, > or simply replicated NFS...) which are all off topic.... > > Then you need to decide your method for connection failover - DNS with > recrd updates when a node fails is probably your best bet if you are > operating on different networks... you can expect your data transfer > volume to be doubled though - as ever file that is created or moved on > one system has to be transfered to the other system... > > m/ > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Lars > Holmström > Sent: July 12, 2003 10:10 AM > To: [EMAIL PROTECTED] > Subject: Re: [courier-users] Disaster tolerant IMAP and SMTP ? > > > The question is about how to create a distributed imap-server with a > multiple site storage. > /Lars > ----- Original Message ----- > From: James A Baker > To: [EMAIL PROTECTED] > Sent: Saturday, July 12, 2003 5:51 PM > Subject: Re: [courier-users] Disaster tolerant IMAP and SMTP ? > > > On Saturday, Jul 12, 2003, at 07:27 US/Central, Lars Holmström > wrote: > > > I consider building a disaster tolerant mailsystem for in and > outgoing mail. > > I already have two ISPs and MX records that direct incoming > mailtraffic properly. > > The problem seems to be the IMAP. > > Does any one have a suggestion for how to do this ? > > /Lars > Ps. Disaster tolerant in my view is when I can afford to loose > one computerroom completely and the service from a users perspective is > still available. Ds. > > > Is your question about how to initially create a redundant IMAP > data store across your server rooms? Or how (after it's all created) to > let users reach it automatically, regardless of which computer room is > still alive after a failure? > > I.e. Server implementation vs. DNS implementation? (...or both?) > > -jab > ------------------------------------------------------- This SF.Net email sponsored by: Parasoft Error proof Web apps, automate testing & more. Download & eval WebKing and get a free book. www.parasoft.com/bulletproofapps1 _______________________________________________ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
