another sendmail ?

[Darin Perusich]

i'm not sure if you can specify multiple DH hosts, i'll have to play
with this hehe.

nfs isn't really an option, and actually strongly discourage. i'm using
the cyrus imap server for handling our local email. cyrus uses berkley
database file to manage the statis info about messages, whether they're
read, unread, urgent, you get the idea. having two process on multiple
servers that can't communicate with each other will basically blow up
these db files. 

the prefered solution, for me at least would be to have either a SAN or
dual controller external scsi disk with both machines attached, the
backup/failover server would have the disk mount read-only with no
daemons running. these machines would running heartbeat,
http://www.linux-ha.org so when node-a goes down, node-b mounts the
filesystem rw, fires up the imap processes, and takes over it's IP
address. hopefully i'll have the SAN by 3rd quarter.

current pratice is to rsync the data hourly. i'd like to start playing
with sgi's fam & imon (File Alteration Monitor and Inode Monitor) so
when anything changes rsync fires. this sounds good but i think it might
take up to much resource.

darin


Robert Dege wrote:
> 
> There are 2 possible solutions.
> 
> 1)  Try the following (not positive)
> 
> # who gets all local email traffic ($R has precedence for unqualified names)
> DHlocalhost.localdomain
> DHotherserver
> 
> 2)  I know it's a dirty word, but what about NFS'ing a remote file server?
> It would lower the load of pcoressing the mail & forwarding, since the
> process will double the work & load.
> 
> > does anyone know of a way to relay an incoming message to multiple
> > hosts? sending the same message to two hosts instead of just one. i'm
> > looking at this from a redundancy/failover standpoint.
> 
> Dege
> 
> So Many Things in Life Would Be Really Funny
> .... If They Weren't Happening To Me

-- 
Darin Perusich
Unix Systems Administrator
Cognigen Corp.
darinper at cognigencorp.com