Hierarchical data doesn't necessarily has anything to do w column families. You 
can do a hierarchical model in a single column family.
It's pretty straight forward.

Sent from my iPhone

On Dec 30, 2011, at 6:34 PM, "Imran M Yousuf" <[email protected]> wrote:

> Hi,
> 
> Rather than addressing the issue of how many column family may be used and
> query performance on them, I would like to address the problem of
> hierarchical data.
> 
> We were facing an issue of storing hierarchical data in one of our
> applications and for solving that, and many other features, we turned
> developed Smart CMS - smart-cms.org If it sounds interesting to your
> problem let me know, we can then collaborate in more details.
> 
> Thank you,
> 
> Imran
> 
> On 28 Dec 2011 13:55, "Mohammad Tariq" <[email protected]> wrote:
> 
> Hello all,
> 
>   Having less no. of column families is advisable. It is feasible to
> have 2 or 3 sub column families within a single column family???I
> want to store xml data in Hbase and I have sub tags that may go down
> to 2 or 3 levels.
> 
> Regards,
>    Mohammad Tariq

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