Schema question

[Morten Wegelbye Nissen]

 Hello List,

No matter where you read, you almost every-where read the the noSQL 
datascema is completely different from the relational way - and after a 
little insight in cassandra everyone can 2nd that.

But I miss to see some real-life examples on how a real system can be 
modelled. Lets take the example for a system where users can send 
messages to each other. ( Completely imaginary, noone would use 
cassandra for a mailsystem :) )

If one should create such a system, what CF's would be used? And how 
would you per example find all not read messages?

./Morten