Speaking about pure fail over - what about pen itself ?

Has anyone got any writeups or comments regarding a load balanced pen,
like mentioned on the web site (Ultimate cheapskate cluster) ?

I'm only looking at two boxes, except that they will also balance other
services located elsewhere. Should the separate interfaces that pen
listens to (not the shared one), be real or can they be virtual ?

This is primarily for ldap, but will probably handle web traffic later
(located elsewhere).

Also, if going with independent LB boxes (such as the original example),
do they need to be powerful boxes ? TIA...

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