The way to query a CF with "start > 10 and end < 100"

Hi, I have a standard CF that has column "start" and "end". I need to query its rows using condition "start>10 and end<100". Is there any better way to do it? Using native secondary index or creating a specific CF for the search. I do not know which one is better. If the late is preferred to, h

For multi-tenant, is it good to have a key space for each tenant?

I wonder if it is a good practice to create a key space for each tenant. Any advice is appreciated. Thanks

CQL v1.0.0: why super column family not descirbed in it?

Hi, I read the CQL v1.0 document. There are operations about column families, but it does not describe how to operate on super column families. Why? Does this mean that super column families would not be supported by CQL in this version? Will it be supported in the future? Thanks. Guofeng