Building the Data Warehouse
[…] we decided that we needed a data warehouse. After numerous false starts and blind alleys, we decided to make our own system from scratch using MySQL. We considered commercial products, and pre-built open source solutions, but they just didn’t seem to fit our needs properly. The data warehouse project commenced with phase 1.
Oldies, but goldies
via: http://sldn.softlayer.com/09/2009/building-the-data-warehouse/