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.
Users no longer have to consider where their data is being stored or where their data request are processed because the database grid is supported by RAC and Oracle Clusterware and the storage grid is supported by the Automatic Storage Management (ASM) system.