1说明

Starting with Oracle Database 12c release 2 (12.2), Oracle Database provides support for separation of duty best practices when administering Oracle Real Application Clusters (Oracle RAC) by introducing the SYSRAC administrative privilege for the clusterware agent. This feature removes the need to use the powerful SYSDBA administrative privilege for Oracle RAC.
SYSRAC, like SYSDG, SYSBACKUP and SYSKM, helps enforce separation of duties and reduce reliance on the use of SYSDBA on production systems. This administrative privilege is the default mode for connecting to the database by the clusterware agent on behalf of the Oracle RAC utilities such as srvctl.

从12.2开始，Oracle提供了SYSRAC这个权限来管理RAC集群。不再需要SYSDBA这个总舵主来劳心了。和SYSDG,SYSBACKUP,SYSKM一样，做了很明显的分工。这样更有有利于管理，提高了安全性，减少了对SYSDBA的依赖。http://www.cndba.cn/Expect-le/article/2561

更多信息参考官方文档：https://docs.oracle.com/en/database/oracle/oracle-database/12.2/tdprc/release_changes.html#GUID-9E2D2327-8AE7-40C5-A27C-4052AF617774http://www.cndba.cn/Expect-le/article/2561http://www.cndba.cn/Expect-le/article/2561http://www.cndba.cn/Expect-le/article/2561http://www.cndba.cn/Expect-le/article/2561http://www.cndba.cn/Expect-le/article/2561

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SYSRAC