DNS round robin will still give you a roughly 50% chance of hitting the system that is down. Although if your ttl for the zone is short enough you could modify it and direct all traffic to the second server. This, however, at best is pseudo redundancy. The smtp protocol offers you to set backup mx records via dns. This will cause the sending server to try all of these before giving up on delivery. (should the server in question be your MX host). Quick search yielded http://www.dyndns.org/support/kb/mxrecords.html on this topic. I would definitely set up the system with 2 drives in a raid 1 configuration. If you can afford it go for hardware raid, otherwise use the md feature in RH. http://www.tldp.org/HOWTO/Software-RAID-HOWTO.html -Tobias -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Ed Wilts Sent: Tuesday, April 27, 2004 6:29 AM To: General Red Hat Linux discussion list Subject: Re: Disaster recovery recommendations for RH Linux 8.0... On Tue, Apr 27, 2004 at 10:07:31AM -0400, Ken Morley wrote: > I have a RH Linux 8.0 server used to filter email for spam and virues. It > receives email, filters it through SpamAssassin and ClamAV and then relays > the email to our Exchange server. The email is only on the server for a few > seconds. This is what we do here. The way we've solved it is to run 2 RHL servers and have DNS records that round-robin between them. If either system fails, the other will take 100% of the load, but on average, each system takes half the load. > Can anyone recommend a simple, inexpensive solution that would allow me to > image the hard drive periodically and quickly restore to a replacement hard > drive? I'm thinking that the backup media would probably be CD-ROM (the > entire installation is only about 800MB uncompressed). http://www.mondorescue.org -- Ed Wilts, Mounds View, MN, USA mailto:ewilts@xxxxxxxxxx Member #1, Red Hat Community Ambassador Program -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
