[Dovecot] Load Balancing and HA

[Edwardo Garcia]

We tried one time software solution, not very reliable under load, we move
to coyotepoint equalizer hardware load balancer, very good cost and
excellent reliable


On Wed, May 29, 2013 at 7:23 AM, Romer Ventura <rventura at h-st.com> wrote:

> Hello,
>
>
>
> I've been thinking about the best way to achieve load balancing and making
> my mail servers highly available. So far I believe I have 2 scenarios:
>
> Scenario1: This should allow any to lose any of the servers and clients
> still have access to their emails (although I am not sure how the indexes
> would react to this and sudden disconnection)
>
> -          2 Dovecot Proxy servers, using a virtual IP to where the clients
> will connect to from the WAN and LAN
>
> -          2 Dovecot+Postfix servers with local cache
>
> -          2 NFS servers and synced with dsync (mirror, 1 server writes to
> its own NFS and changes synced to the other via dsync)
>
>
>
> Scenario2: Pretty much as above on the back end. However, with this there
> is
> no way to load balance users.
>
> -          2 Dovecot+Postfix server with local cache
>
> -          2 NFS servers synced with dsync
>
> -          Make use of DNS MX record priority to provide access to
> secondary
> email server
>
>
>
>
>
> Anyone care to comment?
>
>
>
> Thanks.
>
>
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