+TDWI have published an article by +Jorge A Lopez containing a 5 point roadmap for HADOOP success. In it he points out that organisations need a longer term roadmap than they may be used to creating for ensuring that this is done successfully.
Jorge also produced an article for them on the business case for HADOOP which is worth reading if you haven't already done so.
He makes and interesting point when he goes through his #2 - Develop an active archive. Data Warehouses or any reporting database is not an archive but also is an expensive archive if you were using it as that. HADOOP gives the possibility of flexibility to use cheaper methods to store and process large amounts of data for reporting.
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