Somewhat OT: Clustering and HA

Julian Field MailScanner at
Tue Feb 26 16:49:46 GMT 2008

Hash: SHA1

You don't need NFS and locking to run a MailScanner cluster. You just 
have n independent MX servers all with the same MX priority (or 1 MX 
record pointing to multiple A records), and have them deliver onwards to 
the same mail servers for client email access.
Don't start trying to share queues between multiple machines: it's 
asking for trouble, a nightmare to manage reliably and unnecessary. 
That's my opinion, anyway :-)

Alex Neuman wrote:
> Dear list,
> From time to time people have been discussing how to set up 
> MailScanner so that you can get a highly-available configuration. NFS 
> and locking have been discussed along with other details regarding how 
> "shared" the configuration is between clusters.
> I'd like to see if it would be possible to use a "pretty standard" 
> config of centos(or 
> rh)+ms+sendmail+dovecot+clamav+spamassassin+mailwatch(maybe)/etc. and 
> how I could either "install from scratch" as a cluster or possibly 
> "upconvert" one.
> Any docs you might suggest where one would look at different Linux 
> clustering scenarios, so I can pick it up from there? I could document 
> my progress on the list or the wiki.


- -- 
Julian Field MEng CITP CEng
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