Mogstored is a real easy setup.
Assuming you've got mogstored installed, the configuration file is very simple:
maxconns = 10000
httplisten = 0.0.0.0:7500
mgmtlisten = 0.0.0.0:7501
docroot = /var/mogdata
maxconns = maximum number of connections at any one given point
httplisten = ip:port to listen on for GET/PUT requests (http) 0.0.0.0 = listen to every bound ip
mgmtlisten = ip:port to listen on for PerlBal management port.
docroot = path of where to store files.
This configuration tends to live in /etc/mogilefs/mogstored.conf , though YMMV will depend if you do custom setups, different packages specify different paths, etc.