Definition of irrigation. 1  1 : the therapeutic flushing of a body part with a stream of liquid. 2  2 : the watering of land by artificial means to foster plant growth.
Answer: To start with, Oracle Real Application Clusters (RAC) are a database system involving a configuration of multiple hosts or servers joined together with clustering software and accessing the shared disk storage structures.
RAC Database and clustering technology helped to set up and manage the overall Oracle Grid strategy. Still today, database processing and capability can be easily and dynamically added with the RAC technology. Thus, RAC is an integral part of Grid computing, but it is not the sum total of it.