data modeling question

[Deno Vichas]

hey all!

i'm started my first project using cassandra and some data model 
questions.  i'm working on an app that fetches stock market data.  i 
need to keep track of when i fetch a set of data for any given stock in 
any sector;  here's what i think my model should look like;

fetches : {
<sector> : {
         quote : {
<timeuuid>: {
<symbol> : ---
            }
        }
        ticks : {
<timeuuid>: {
<symbol> : ---
            }
        }
        fundamentals : {
<timeuuid>: {
<symbol> : ---
            }
        }
    }
}


is there anything that less an ideal doing it this way versus creating 
separate CF per sector?    how do you create Super CF inside of Super CF 
via the CLI?



thanks,
deno