Date: Sat, 7 Aug 2004 14:40:02 +0300 From: Odhiambo Washington <wash@wananchi.com> To: Bill Moran <wmoran@potentialtech.com> Cc: aharrison@gmail.com Subject: Re: What's the best possible email failover solution Message-ID: <20040807114002.GD1807@ns2.wananchi.com> In-Reply-To: <20040621175626.3e762448.wmoran@potentialtech.com> References: <20040621132006.2b1a296f.wmoran@potentialtech.com> <a22ff294040621115173bad2e0@mail.gmail.com> <20040621172520.3544d6fe.wmoran@potentialtech.com> <20040621214348.GB63857@happy-idiot-talk.infracaninophile.co.uk> <20040621175626.3e762448.wmoran@potentialtech.com>
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* Bill Moran <wmoran@potentialtech.com> [20040622 00:57]: wrote: > Matthew Seaman <m.seaman@infracaninophile.co.uk> wrote: > > > On Mon, Jun 21, 2004 at 05:25:20PM -0400, Bill Moran wrote: > > > > > The return can be significant. The company I am doing this for provides IMAP > > > mail services for business. If a filesystem crashes and service is down for a > > > while, we can easily lose clients. If we had some sort of failover, we'd be > > > able to just switch the IP on the backup machine and life would be good. > > > > > > "long way to go" is what I'm trying to establish. I was hoping to find > > > something workable without reinventing the wheel. For example, Postgresql can > > > do real-time replication between two Postgresql servers using Slony. If I can > > > find an IMAP server that will keep the mail folders in PostgreSQL, I've got my > > > failover system ... tada! > > > > http://wiki.dovecot.org/moin.cgi/DovecotPostgresql > > Unfortunately, this only keeps the user database in Postgresql, but not the > mailboxes themselves. We already have the equivalent of this using LDAP, and > I'm in the process of setting up a slave LDAP server for redundancy. > > It's the mailboxes themselves that are difficult to get. Best we've got right > now is backing up the Cyrus mail folders using rsync ... but this is very time- > consuming, and (thus) only done once a day. In order for it to be done right, > Cyrus has to be shut down while it's backing up. Hello Bill and everyone, I know it is already August. I did not read this list all this time, leave alone the thread! But anyway, Bill says they use LDAP, yes? How about this solution: # High Availability Mail server http://bsdvault.net/sections.php?op=viewarticle&artid=99 http://bsdvault.net/sections.php?op=viewarticle&artid=100 Looks like what Bill wanted, no? -Wash http://www.netmeister.org/news/learn2quote.html -- +======================================================================+ |\ _,,,---,,_ | Odhiambo Washington <wash@wananchi.com> Zzz /,`.-'`' -. ;-;;,_ | Wananchi Online Ltd. www.wananchi.com |,4- ) )-,_. ,\ ( `'-'| Tel: +254 20 313985-9 +254 20 313922 '---''(_/--' `-'\_) | GSM: +254 722 743223 +254 733 744121 +======================================================================+ The trouble with being poor is that it takes up all your time.
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