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Storage Foundation for Oracle® RAC 7.3.1 Administrator's Guide - Linux
Last Published:
2018-01-16
Product(s):
InfoScale & Storage Foundation (7.3.1)
- Section I. SF Oracle RAC concepts and administration
- Overview of Storage Foundation for Oracle RAC
- About Storage Foundation for Oracle RAC
- Component products and processes of SF Oracle RAC
- About Virtual Business Services
- Administering SF Oracle RAC and its components
- Administering SF Oracle RAC
- Starting or stopping SF Oracle RAC on each node
- Administering VCS
- Administering I/O fencing
- About the vxfentsthdw utility
- Testing the coordinator disk group using the -c option of vxfentsthdw
- About the vxfenadm utility
- About the vxfenclearpre utility
- About the vxfenswap utility
- Administering the CP server
- Administering CFS
- Administering CVM
- Changing the CVM master manually
- Administering Flexible Storage Sharing
- Backing up and restoring disk group configuration data
- Administering SF Oracle RAC global clusters
- Administering SF Oracle RAC
- Overview of Storage Foundation for Oracle RAC
- Section II. Performance and troubleshooting
- Troubleshooting SF Oracle RAC
- About troubleshooting SF Oracle RAC
- Troubleshooting I/O fencing
- Fencing startup reports preexisting split-brain
- Troubleshooting CP server
- Troubleshooting server-based fencing on the SF Oracle RAC cluster nodes
- Issues during online migration of coordination points
- Troubleshooting Cluster Volume Manager in SF Oracle RAC clusters
- Troubleshooting CFS
- Troubleshooting interconnects
- Troubleshooting Oracle
- Troubleshooting ODM in SF Oracle RAC clusters
- Prevention and recovery strategies
- Tunable parameters
- Troubleshooting SF Oracle RAC
- Section III. Reference
Voting disk
The voting disk is a heartbeat mechanism used by Oracle Clusterware/Grid Infrastructure to maintain cluster node membership.
In Oracle RAC 11g Release 2 and later versions, voting disk data exists on ASM or on a cluster file system that is accessible to each node.
The Oracle Clusterware Cluster Synchronization Service daemon (ocssd) provides cluster node membership and group membership information to RAC instances. On each node, ocssd processes write a heartbeat to the voting disk every second. If a node is unable to access the voting disk, Oracle Clusterware/Grid Infrastructure determines the cluster is in a split-brain condition and panics the node in a way that only one sub-cluster remains.