Exadata is a high performance hardware storage from Oracle. It was not mention here, Oracle Exadata power by Oracle Linux.
Take a look, who is using Oracle Exadata? Including mobile operators like China Mobile, SK mobile (the largest mobile operator in Korea).
Sure it is expensive, I don't now sure how much it cost. Talk to the Oracle people.
Oracle host a lot of online webcast event. Webcast save users a lot of time, but you don't meet the people face to face, less interactive.