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.
Oracle will support the Oracle software on clusters comprised of RAC compatible technologies and supported software combinations. Please consult your hardware and software vendors as not all vendors may choose to support their hardware or software in every possible cluster combination.