> > Now certainly, you can build a >100TB Oracle instance, but the cost and > the complexity would be challenging. In addition, presumably they only > see this data store growing, and how do you deal with a 200, 300, 400TB > Oracle instance? Google, for example, in 2006 had approximately 1.2PB > of data in their structured data store. Heaven knows what it is now. > semi off topic Yahoo has a datawarehouse of 2PB and 24 Bilions of 'events' ( changes? ) per day. They got postgresql source code and rebuild some parts to meet their needs Afaik, they are very happy with the results http://www.dbms2.com/2008/05/29/yahoo-scales-web-analytics-database-petabyte/ D.