Disaster recovery recommendations for RH Linux 8.0...

[Edward J. Weinberg]

On Tue, 2004-04-27 at 14:15, Tobias Speckbacher wrote:

> 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.

Might do that.  You need to think like a lawyer.  The RFC says you CAN
try other MS records, not that your mail server MUST try them.  Some
mail servers do and some don't.

Your reference supports this:
"In addition to specifying the mail server which should receive mail for
a domain, MX records can also specify the host(s) to which mail can be
delivered if the primary mail server is off-line."

CAN be delivered is different from MUST be delivered.

That means that some email might be delivered to the secondary MX.

> 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 at redhat.com
> [mailto:redhat-list-bounces at redhat.com] 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 at ewilts.org
> Member #1, Red Hat Community Ambassador Program
> 
> 
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-- 
Edward J. Weinberg <edw at q5comm.com>