Redundant Mail Servers

2002-02-19 Thread Fraser Campbell
Hi, We need to implement redundant mail servers and I'm looking for some ideas. The two mail servers are in different offices but should at all times contain identical data (well all of the same email at least). So far: - Postfix will be the MTA - Courier IMAP will be used for mail retr

Redundant Mail Servers

2002-02-19 Thread Fraser Campbell
Hi, We need to implement redundant mail servers and I'm looking for some ideas. The two mail servers are in different offices but should at all times contain identical data (well all of the same email at least). So far: - Postfix will be the MTA - Courier IMAP will be used for mail retr

Re: redundant mail servers

2002-01-29 Thread Andrei V. Darashenka
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, It is too complex. I do the following: I have a friend who knows (a little) the topology of our network. I write root and users passwords on the paper, put it into the safe, and ask my boss to call him, if something goes wrong... ;) > > I wan

Re: redundant mail servers

2002-01-27 Thread Russell Coker
On Sat, 26 Jan 2002 16:38, Jeremy C. Reed wrote: > On Sat, 26 Jan 2002, Florian Friesdorf wrote: > > > Why do you need something special for only 20 users anyway? > > > > I'll be in South America for 2 months with only seldom Internet Access. > > They know their NT desktops, but not their servers.

Re: redundant mail servers

2002-01-25 Thread Jeremy C. Reed
On Sat, 26 Jan 2002, Florian Friesdorf wrote: > > Why do you need something special for only 20 users anyway? > > I'll be in South America for 2 months with only seldom Internet Access. > They know their NT desktops, but not their servers. > > So I want a solution, where they can't do too much

Re: redundant mail servers

2002-01-25 Thread Florian Friesdorf
On Sat, Jan 26, 2002 at 01:28:39PM +1100, Russell Coker wrote: > On Sat, 26 Jan 2002 01:14, Florian Friesdorf wrote: > > > Please let me know, if I'm heading in the wrong direction. The setup > > will be for a team with 20 persons, so there won't be too much mail > > traffic. The only problem is,

Re: redundant mail servers

2002-01-25 Thread Russell Coker
On Sat, 26 Jan 2002 01:14, Florian Friesdorf wrote: > Is it possible (case 2) to run a software raid1 over two partitions (one > on each raid5) from both computers at the same time? It's not possible to have one partition in use by two computers at the same time unless you use GFS or something s

Re: redundant mail servers

2002-01-25 Thread Nicolas Bouthors
Florian Friesdorf said : >> I just read through the drbd homepage and HOWTO. Sounds very good to >> me. Can you recommend it? Did anyone experience any strange/bad >> behaviour using it? Well I do. Here we have a failover 2-node cluster serving NFS over DRBD and (surprisingly) it works like

Re: redundant mail servers

2002-01-25 Thread Michael Wood
Hi On Fri, Jan 25, 2002 at 03:14:18PM +0100, Florian Friesdorf wrote: > Hi, > > I want to setup a redundant mail system using exim with > maildirs. I thought I use two mail servers (one scsi > controller each) and one scsi raid. > > 1.Server1 ---SCSI--- RAID5 ---SCSI--- Server2 > [snip] >

Re: redundant mail servers

2002-01-25 Thread Florian Friesdorf
On Fri, Jan 25, 2002 at 03:33:04PM +0100, Nicolas Bouthors wrote: > Florian Friesdorf said : > >> Is it possible (case 1) to mount one ext2 partition on two > >> computers at > >> the same time? > > No. Mounting may modify the superblock, and confuse the other machine > suffisently for it to c

Re: redundant mail servers

2002-01-25 Thread Nicolas Bouthors
Florian Friesdorf said : >> Is it possible (case 1) to mount one ext2 partition on two computers at >> the same time? No. Mounting may modify the superblock, and confuse the other machine suffisently for it to crash and leave the FS in an unexpected state. >> Well, there is another one - I'v

redundant mail servers

2002-01-25 Thread Florian Friesdorf
Hi, I want to setup a redundant mail system using exim with maildirs. I thought I use two mail servers (one scsi controller each) and one scsi raid. 1.Server1 ---SCSI--- RAID5 ---SCSI--- Server2 or to remove the RAID as a Single Point of Failure: 2 RAIDs and 4 SCSI controllers: