Hardcore Database?

Hi @ everybody. Ok, here is the thing! Just try to imaging, you have to save something like 4 - 5 Mio. Database entries (lengh could be between 10 and 16 char's.) and this every 5 min, for something like 2 weeks. and here are my questions which database you would use? which hardware would be required? how big could be the database after the first 4 - 5 mio entries? if someone have a idee please send me asap a feedback thx -- Best regards, CBQ mailto:bq777@gmx.at