CRS Resource Introduction In Oracle 19c RAC-20220125
导读：简述Oracle 19c RAC CRS资源与作用。
1.环境与db版本
环境：oracle 19c rac on three nodes for redhat8.3 db版本：19.9（已应用19.9RU） SQL> select * from v$version; BANNER ---------------------------------------------------------------------------------------------------------------------------------------------------------------- BANNER_FULL -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- BANNER_LEGACY CON_ID ---------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------- Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.9.0.0.0 Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
2.CRS资源查看与资源简述
[grid@rac1:/home/grid]$crsctl stat res -t -------------------------------------------------------------------------------- Name Target State Server State details -------------------------------------------------------------------------------- Local Resources -------------------------------------------------------------------------------- ora.LISTENER.lsnr # local listeners资源，从11gr2开始，listener.ora文件会自动生成，不需要手动修改 ONLINE ONLINE rac1 STABLE ONLINE ONLINE rac2 STABLE ONLINE ONLINE rac3 STABLE ora.chad # 12.2新增守护进程，ora.chad是Cluster Health Advisor简称CHA，属于Autonomous Health Framework(自治健康框架) ONLINE ONLINE rac1 STABLE ONLINE ONLINE rac2 STABLE ONLINE ONLINE rac3 STABLE ora.net1.network # 网络资源，管理集群的public ip，scanvip，vip，listener等资源都依赖于ora.net1.network # VIP资源依赖于ora.net1.network资源，当ora.net1.network资源发生问题时，可能会造成vip的failover或listener offline ONLINE ONLINE rac1 STABLE ONLINE ONLINE rac2 STABLE ONLINE ONLINE rac3 STABLE ora.ons # 参考：Doc ID 759895.1 # ora.ons是Oracle Notification Service daemon的守护进程，它是nodespps的一部分。 # 通过ons/evmd/racgimon集群守护进程来完成把FAN/RLB事件通知给application subscribers and the local listeners ONLINE ONLINE rac1 STABLE ONLINE ONLINE rac2 STABLE ONLINE ONLINE rac3 STABLE -------------------------------------------------------------------------------- Cluster Resources -------------------------------------------------------------------------------- ora.ARCH.dg(ora.asmgroup) 1 ONLINE ONLINE rac1 STABLE 2 ONLINE ONLINE rac2 STABLE 3 ONLINE ONLINE rac3 STABLE ora.ASMNET1LSNR_ASM.lsnr(ora.asmgroup) # 12.1新增flex asm，选择flex asm需配置oracle asm network，所有节点启动时自动开启ora.ASMNET1LSNR_ASM.lsnr(ora.asmgroup)监听资源 1 ONLINE ONLINE rac1 STABLE 2 ONLINE ONLINE rac2 STABLE 3 ONLINE ONLINE rac3 STABLE ora.DATA.dg(ora.asmgroup) # asm磁盘组资源 1 ONLINE ONLINE rac1 STABLE 2 ONLINE ONLINE rac2 STABLE 3 ONLINE ONLINE rac3 STABLE ora.LISTENER_SCAN1.lsnr # 参考：Doc ID 887522.1 # ora.LISTENER_SCAN1.lsnr监听scan ip，并被配置在remote_listener # ora.LISTENER_SCAN1.lsnr数量决定于scan name解析的ip，最多3个 1 ONLINE ONLINE rac3 STABLE ora.OCR.dg(ora.asmgroup) # asm磁盘组资源 1 ONLINE ONLINE rac1 STABLE 2 ONLINE ONLINE rac2 STABLE 3 ONLINE ONLINE rac3 STABLE ora.asm(ora.asmgroup) # flex asm，asm实例资源 1 ONLINE ONLINE rac1 Started,STABLE 2 ONLINE ONLINE rac2 Started,STABLE 3 ONLINE ONLINE rac3 Started,STABLE ora.asmnet1.asmnetwork(ora.asmgroup) # flex asm，所有节点启动时自动开启ora.asmnet1.asmnetwork资源（此网络资源可于私有网络共享），为所有节点asm 监听资源提供服务 1 ONLINE ONLINE rac1 STABLE 2 ONLINE ONLINE rac2 STABLE 3 ONLINE ONLINE rac3 STABLE ora.cvu # 参考：Doc ID 1524235.1 # 11.2.0.2 gi引入的新资源，目的是定期调用cvu资源进行集群健康检查 1 ONLINE ONLINE rac3 STABLE ora.qosmserver # Memory Guard依赖ora.qosmserver资源实现高可用 # Memory Guard作用通过防止节点因内存不足受到压力时被驱逐，持续监控并确保集群节点的可用性。 1 ONLINE ONLINE rac3 STABLE ora.rac1.vip # 节点对应的VIP资源，ora.rac1.vip是ora.LISTENER.lsnr依赖的资源 1 ONLINE ONLINE rac1 STABLE ora.rac2.vip 1 ONLINE ONLINE rac2 STABLE ora.rac3.vip 1 ONLINE ONLINE rac3 STABLE ora.racdb.db 1 ONLINE ONLINE rac1 Open,HOME=/u01/app/o racle/product/19.0.0 /db_1,STABLE 2 ONLINE ONLINE rac2 Open,HOME=/u01/app/o racle/product/19.0.0 /db_1,STABLE 3 ONLINE ONLINE rac3 Open,HOME=/u01/app/o racle/product/19.0.0 /db_1,STABLE ora.scan1.vip # 参考：Doc ID 887522.1 # scan1.vip是LISTENER_SCAN1.lsnr依赖的资源 # scan1.vip数量决定于scan name解析的ip，最多3个 1 ONLINE ONLINE rac3 STABLE --------------------------------------------------------------------------------
3.文献参考
https://blogs.oracle.com/database4cn/post/11gr2-gi