On 2011-01-11 at 16:25:38 +0000, Jonathan Tripathy wrote: > So have my entire email system run on 2 boxes alone? What if the > postfix box were to go down? What if the Dovecot box were to go > down? In my solution, if a box (or VM in my case) were to go down, > at least something parts of the system would still function.
I worked for an ISP that handled mail for about 25,000 mailboxes and over 500,000 messages per day. We had two identical boxes with Postfix and Dovecot serving our customers. If one went down our load balancer directed all traffic to the other one. You could do the same thing with virtual machines if necessary. The part that seems wrong to me is setting up an entire VM for each customer. If your VM host goes down, you have lots of little VMs to recover instead of a few VMs or a few physical servers. Just food for thought. You know your network and setup better than I do. I just know what you've passed on to the list. -A
