MScanner Disaster Recovery

[Garry Glendown]

    [ The following text is in the "ISO-8859-1" character set. ]
    [ Your display is set for the "US-ASCII" character set.  ]
    [ Some characters may be displayed incorrectly. ]

Joe Smith wrote:
> On Tue, 1 Feb 2005, Stephen Swaney wrote:
>
>
>>With this configuration it's lose a gateway at 1:00 AM - fix it the next
>>morning because email will still be delivered.
>
>
> What about when the gateway that goes down also handles the POP3 accounts?
> I know about the only way to provide a secondary lookup for a POP3 server
> is via DNS somehow,  and this could have way too much lag time.
>
> I was thinking about this then I thought about having users setup 2
> identical accounts in LookOut Express, except they go to different servers
> on different networks.
>
> So if mail ends up on MX1 it stays there for pickup, and if it ends up on
> MX2 it stays there for pickup.    If MX1 or MX2 goes down then users will
> still get their mail,  they will just get a warning messages about which
> host is down.      A little user training would have to be done.
>
> Any thoughts or chinks in my armor or does someone have a better plan?

The only way to fix this would be do set up some kind of cluster that
uses a central storage e.g. with Cyrus Imap and then a failover between
the two machines (or a load balancer in front of it). We tried several
approaches for our company and ended up getting a SAN set up for all
high availability applications like POP or Webservers ... (please note:
MS will NOT need this, as a simple round-robin will do nicely ...)

-garry

------------------------ MailScanner list ------------------------
To unsubscribe, email jiscmail at jiscmail.ac.uk with the words:
'leave mailscanner' in the body of the email.
Before posting, read the MAQ (http://www.mailscanner.biz/maq/) and
the archives (http://www.jiscmail.ac.uk/lists/mailscanner.html).

Support MailScanner development - buy the book off the website!