On Tue, Dec 12, 2000 at 08:50:20PM +0000, Gustavo Vieira Goncalves Coelho Rios
scribbled:
| i am planning a very big email server, currently i am planning for about
| 8*2^16 users.
[snip]
| What you wizard have to say about my approach?
Why would you not want to have a distributed server in this case?
I would distribute the load between 2-4 servers that will easily
handle the load, creating vastly greater fault tolerance and
redundancy.
Incoming SMTP go to several MX'es and into a database
server. The master database server would have a slave db server
that constantly syncs its files from the master. In the case
of primary db server failure, slave becomes the master transparently
by a simple ifconfig(8) command (probably some other small config changes
that can be automated by a shell script). The db servers cater
to POP/IMAP servers.
Outgoing SMTP is round robined and should not be too much trouble.
So, for projects with less funding, a 3 server distributed system
would be much more preferable. If your organization has 8*2^16
servers, it certainly can afford 3 celeron/k6/pIII boxes.
(Of course, some people prefer to buy Sun Enterprise10000's...)
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