Well, in a typical installation, you won't be running ZEO on the same machine as Zope, right? ZEO has its own install and config stuff, which is very similar to that for Zope, but ZEO is not installed as part of the main Zope install.
I routinely run ZEO on all of my sites, on the same machine. I don't gain any "scalability" benefits this way, but it is fantastic for debugging and tweaking a live site.
My creaky old zctl.py auto-starts ZEO when necessary, using the same configuration data as it uses for the associated Zope instance, so they both know to use 'var/zeo.soc' to connect.
Evan @ 4-am
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