oracle 10g RAC app VIP ,ONS,GSD,ASM,OCR,VOTE名称及代表的涵义。

To verify the existence of node applications,

 

virtual IP (VIP)

Oracle Notification Services (ONS) 

Global Service Daemon (GSD)

Automatic Storage Management (ASM)

Oracle Cluster Registry(OCR)

 

Voting disk（表决磁盘）记录集群节点信息,它是CSS需要的文件，用来判断机群内各个节点的状态----最少需要磁盘空间20M

–Manages cluster membership and arbitrates cluster ownership between the nodes in case of network failures. The voting disk is a file that resides on shared storage. For high availability, Oracle recommends that you have more
than one voting disk, and that you have an odd number of voting disks. If you define a single voting disk, then use mirroring at the file system level for redundancy.

 

Oracle Cluster Registry (OCR)（Oracle 集群注册）存储集群配置信息,它记录了机群配置和机群数据库的基本配置----最少需要磁盘空间100M

–Maintains cluster configuration information as well as configuration information about any cluster database within the cluster.
The OCR contains information such as which database instances run on which nodes and which services run on which databases. The OCR also stores information about processes that Oracle Clusterware controls. The OCR resides on
shared storage that is accessible by all the nodes in your cluster. Oracle Clusterware can multiplex, or maintain multiple copies of, the OCR and Oracle recommends that you use this feature to ensure high availability.