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From: "Matt Douhan" <matt@hasta.se>
To: "ROBERTO SIANO" <rs@newmediaplan.it>,
	<freebsd-cluster@freebsd.org>
Date: Thu, 10 Jun 2004 13:57:38 +0200
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Subject: SV: ***SPAM*** HA cluster
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-----Ursprungligt meddelande-----
Fran: owner-freebsd-cluster@freebsd.org
Hi there
can you suggest a good HA solution based on freeBSD servers, like the
following.
Load balancing TCP+UDP on virtual ip + failover on the routers.


                       ( net )

                          |
                          |
                          |
                      ----------
                     |  switch  |
                      ----------
                      /        \
                     /          \
             ----------      ---------- failover
            |  active          backup
               router  |    |  router  |
             ----------      ----------
       load-balance \          /
                     \   VIP  /
                     ----------
                    |  switch  |
                     ----------
                      /      \
                     /        \
              ----------     ----------
             | server1  |   | server2  |
              ----------     ----------
                     real servers



This solution make no real sense, why have HA servers when you do not have
HA switches?, you are likely to set yourself up for disappointment is all,
use seperate switches as well in order to get a real HA solution.

Also in order to give more accurate answer we would need to know what
applications/services you will be providing, there is a huge difference
between all TCP and only wanting HTTP/HTTPS failover and so on.

regards

Matt