Grid computing has become a hot spot, and its low cost, high performance and convenient access to computing resources are exactly what many enterprises are pursuing. The future database will be built on the grid computing environment.

RAC(Real Application Cluster) is a new technology adopted by Oracle9i database, and it is also the core technology for Oracle database to support grid computing environment. Its appearance solves an important problem in traditional database application: the contradiction between high performance, high scalability and low price.

In addition to RAC technology, Oracle9i database also provides other functions supporting grid computing, including portable tablespaces supporting rapid data replication between databases, Oracle Streams supporting data stream update, and a portable code base supporting application portability. Mendelsohn believes that Oracle9i RAC, blade server and Linux operating system can completely replace the traditional mainframe-based data system for those enterprises that need to establish data centers.

To be precise, it should be a database technology supporting grid, and G in Oracle 10g is the grid.