In database computing, Oracle Real Application Clusters (RAC) — an option[1] for the Oracle Database software produced by Oracle Corporation and introduced in 2001 with Oracle9i — provides software for clustering and high availability in Oracle database environments. Oracle Corporation includes RAC with the Enterprise Edition, provided the nodes are clustered using Oracle Clusterware.[2]
原文：https://www.cnblogs.com/kakaisgood/p/11842818.html