Re: [exim] Load Balancing (2) Exim servers

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Author: Renaud Allard
Date:  
To: andrew.johnson
CC: exim-users, 'Jeroen van Aart'
Subject: Re: [exim] Load Balancing (2) Exim servers


Andrew Johnson wrote:
> 2 other alternatives :-
>
> Hardware loadbalancer (such as Alteon or F5)
>
> Linux as a loadbalancer - there are various iptables options that can be
> used to loadbalance connections, though I'm not sure how well these work if
> one of your email servers goes down.
>
> At least with the Alteon load balancers, they can do helath checks and look
> for smtp banners to decide if the server is available.
>


Another free and secure alternative:

OpenBSD's hoststated as a loadbalancer.
     hoststated is a host status daemon for server load-balancing.  It moni-
     tors groups of hosts for availability, which is determined by checking
     for a specific service common to a host group.  When availability is con-
     firmed, Layer 3 and/or Layer 7 load-balancing services are set up by
     hoststated.