Multiple servers and NFS

[Eduardo Ramos]

Hi Richard,

I think its better balance with a router too. Is there any problem with 
use postfix+amavis in the front-end? I did not understand what the 
advantage of use dovecot LMTP with director too.


On 07/25/2014 01:58 AM, Richard Hector wrote:
> On 25/07/14 15:30, Eduardo Ramos wrote:
>> Hi Richard,
>>
>> In fact I thought it a little confusing. I had some bad experience with
>> DNS RR when one of my IMAP server got down. Clients continued trying
>> connect to broken server and it caused some problems. But when
>> everything is ok, it works well.
>>
>> I drew a diagram with my idea. What do you think?
>>
>> https://dl.dropboxusercontent.com/u/41373531/mail.png
> Interesting, thanks. I'd forgotten to draw in the director ring.
>
> As I said, if we need load balancing we can do that on the router, which
> as I understand it will do more or less the same thing as LVS. It might
> be Cisco SLB, but I'm not sure; I'm not the router guy :-)
>
> But what interests me most is that your diagram shows the mx servers
> connecting directly to the backend servers, rather than going through
> the proxy director - I thought that was a no-no. Oh, and I don't think
> we want to load down our front-end MX servers with amavis, either.
>
> Thanks for your input :-)
>
> Richard