What is Oracle Grid Computing?
Grid computing is the coordinated use of a large number of servers and storage acting as one computer. Grids are built with low-cost modular components where processing power can be shared. It enables you to start small and add servers gradually as your business grows. Oracle grid computing maximizes server resources, delevers low cost computing power and easy to use. Oracle Database 10g and Oracle Application Server 10g is a complete software platform designed for grid computing Source : Oracle.