1、--查詢RAC中數據庫實例的信息
srvctl config database -d yjdd（實例名）-a
Database unique name: yjdd
Database name: yjdd
Oracle home: /u01/app/oracle/product/11.2.0/db_1
Oracle user: oracle
Spfile: +DBDATA/yjdd/spfileyjdd.ora
Domain: nxnm.gov.cn
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: yjdd
Database instances: yjdd1,yjdd2
Disk Groups: DBDATA,ARCH
Services:
Database is enabled
Database is administrator managed
2、安裝完RAC後，CRS進程棧默認隨操作系統的啓動而自動啓動
出於維護的目的有時需要關閉這個特性，登錄root用戶執行下面命令：
[root#]$CRS_HOME/bin/crsctl disable crs
重新打開特性的命令
[root#]$CRS_HOME/bin/crsctl enable crs
上面的命令實際是修改了文件/etc/oracle/scls_scr/db01/root/crsstart的內容
# more /etc/oracle/scls_scr/db01/root/crsstart
enable