> The downside is it still has a hotspot when inserting, but when reading a 
> range of time it does not

How can you do a scan query between dates when you hash the date?

> Column qualifiers are just the collection of items you are aggregating on. 
> Values are increments. In your case qualifiers might look like
> c:usa, c:usa:sex:m, c:usa:sex:f, c:italy:sex:m, c:italy:sex:f, c:italy,

What happens when we add more fields? Do we just keep adding in more
column qualifiers? If so, how would we filter across columns to get an
aggregate total?

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