Limit total number of columns for multiget_slice

Hello, I want to know if the following is possible: I want to query multiple keys in a column family. I want to limit the total # of columns returned. The number of columns for a given key can be anywhere from 0 to several million. For example I want to get 50 columns total from keys A & C. I

data model and queries.

I am trying to find out if Cassandra will fill my needs. I have a data model similar to below. Users = { //ColumnFamily user1 = { //Key for Users ColumnFamily message1 = { //Supercolumn