20 Billion Rows/Month - Hbase / Hive / Greenplum / What?

Question

I\'d like to use your wisdom for picking up the right solution for a data-warehouse system. Here are some details to better understand the problem:

Data is organized in

Answer 1

An alternative for a low number of users would be a (beowulf) cluster. 20K buys you 50 nettops with 500G each. That's about 3KW peak power. Or 4 months of cloud storage.