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- RAC默认服务配置优先节点
标签归档:服务优先节点
RAC默认服务配置优先节点
在某些rac情况下需要,需要对数据库默认的db_name对应的服务名进行修改,实现优先节点访问的效果.分析了下在默认值情况下,db_name影响到db_unique_name,然后决定了数据库的service_names.现有库的db_name无法修改,那就只能在db_unique_name上做手脚(只是修改service_names,对应的db_unique_name还是会创建默认服务,这样该服务依旧可以连接).但是在rac环境中db_unique_name记录到了crs资源之中,无法直接在数据库级别修改(修改会报ORA-32017 ORA-65500错误)
SQL> alter system set db_unique_name='nxifenfei' sid='*' scope=spfile; alter system set db_unique_name='nxifenfei' sid='*' scope=spfile * ERROR at line 1: ORA-32017: failure in updating SPFILE ORA-65500: could not modify DB_UNIQUE_NAME, resource exists
只能先删除crs中关于db的资源,然后再进行修改服务名,再增加db资源
[oracle@xffdb1 ~]$ srvctl remove database -d xifenfei -f SQL> alter system set db_unique_name='nxifenfei' sid='*' scope=spfile; [oracle@xffdb1 ~]$ srvctl add database -d nxifenfei -o /u01/app/oracle/product/19c/db_1 -p \ +DATADG/XIFENFEI/PARAMETERFILE/spfile.271.1174153165 -pwfile +DATADG/XIFENFEI/PASSWORD/pwdxifenfei.256.1174152463 [oracle@xffdb1 ~]$ srvctl add instance -d nxifenfei -i xifenfei1 -n xffdb1 [oracle@xffdb1 ~]$ srvctl add instance -d nxifenfei -i xifenfei2 -n xffdb2 [oracle@xffdb1 ~]$ srvctl add instance -d nxifenfei -i xifenfei3 -n xffdb3
创建新服务(和db_name同名,和现在的db_unique_name不同名)
[oracle@xffdb1 ~]$ srvctl add service -db nxifenfei -service xifenfei -r xifenfei2 -a xifenfei1,xifenfei3 \ -failovertype SESSION -failovermethod BASIC -failoverdelay 10 -failoverretry 3 -failback YES [oracle@xffdb1 ~]$ srvctl start service -db nxifenfei -service xifenfei [oracle@xffdb1 ~]$ srvctl config service -d nxifenfei -service xifenfei Service name: xifenfei Server pool: Cardinality: 1 Service role: PRIMARY Management policy: AUTOMATIC DTP transaction: false AQ HA notifications: false Global: false Commit Outcome: false Failover type: SESSION Failover method: BASIC Failover retries: 3 Failover delay: 10 Failover restore: NONE Connection Load Balancing Goal: LONG Runtime Load Balancing Goal: NONE TAF policy specification: NONE Edition: Pluggable database name: Hub service: Maximum lag time: ANY SQL Translation Profile: Retention: 86400 seconds Failback : yes Replay Initiation Time: 300 seconds Drain timeout: Stop option: Session State Consistency: DYNAMIC GSM Flags: 0 Service is enabled Preferred instances: xifenfei2 Available instances: xifenfei1,xifenfei3 CSS critical: no Service uses Java: false [grid@xffdb1 ~]$
服务的其他操作
--调整服务的优先节点 srvctl modify service -db nxifenfei -service xifenfei -modifyconfig -preferred "xifenfei1" -available "xifenfei2,xifenfei3" srvctl stop service -db nxifenfei -service xifenfei srvctl start service -db nxifenfei -service xifenfei --切换服务所在节点 srvctl relocate service -db nxifenfei -service xifenfei -oldinst xifenfei2 -newinst xifenfei1 --删除服务 srvctl stop service -db nxifenfei -service xifenfei srvctl remove service -db nxifenfei -service xifenfei