Start with a open-source DB(can't go wrong with Postgre or mysql) -- if you start hitting a wall, start looking into specific database optimized for financial d

Start with a open-source DB(can't go wrong with Postgre or mysql) -- if you start hitting a wall, start looking into specific database optimized for financial data like Kx(http://kx.com/ http://kx.com/) Do you have any SLA/other constraints on how fast you have to deliver financial data?