Multiple servers and NFS

[Eduardo Ramos]

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

On 07/24/2014 09:25 PM, Richard Hector wrote:
> On 25/07/14 09:12, Richard Hector wrote:
>> Rather than trying to draw increasingly complex diagrams in ASCII, I've
>> put some here (without the LVS layer):
>> https://walnut.gen.nz/mail-architectures.png
>
> I've come up with a revised plan - I think we can do without LVS; SMTP 
> should just work with multiple MX records, and IMAP/POP should be fine 
> as well with RRDNS - the machines should be up most of the time, and 
> if a customer has to click to reconnect every now and then on the rare 
> occasions when they're not it's not a huge deal. Otherwise, we could 
> also do load balancing on our routers.
>
> Anyway - any comments on the sanity of this diagram most welcome :-)
>
> https://walnut.gen.nz/mail-architecture-2.png
>
> Richard