Storage Foundation for Oracle® RAC 7.4.1 Administrator's Guide - Linux
- 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
About the vxfenclearpre utility
You can use the vxfenclearpre utility to remove SCSI-3 registrations and reservations on the disks as well as coordination point servers.
See Removing preexisting keys.
This utility now supports server-based fencing. You can use the vxfenclearpre utility to clear registrations from coordination point servers (CP servers) for the current cluster. The local node from where you run the utility must have the UUID of the current cluster at the /etc/vx/.uuids directory in the clusuuid file. If the UUID file for that cluster is not available on the local node, the utility does not clear registrations from the coordination point servers.
Note:
You can use the utility to remove the registration keys and the registrations (reservations) from the set of coordinator disks for any cluster you specify in the command, but you can only clear registrations of your current cluster from the CP servers. Also, you may experience delays while clearing registrations on the coordination point servers because the utility tries to establish a network connection with the IP addresses used by the coordination point servers. The delay may occur because of a network issue or if the IP address is not reachable or is incorrect.
For any issues you encounter with the vxfenclearpre utility, you can you can refer to the log file at, /var/VRTSvcs/log/vxfen/vxfen.log
file.
See Issues during fencing startup on SF Oracle RAC cluster nodes set up for server-based fencing.