Storage Foundation for Sybase ASE CE 7.4 Administrator's Guide - Linux
- Overview of Storage Foundation for Sybase ASE CE
- About Storage Foundation for Sybase ASE CE
- How SF Sybase CE works (high-level perspective)
- About SF Sybase CE components
- About optional features in SF Sybase CE
- How the agent makes Sybase highly available
- About Veritas InfoScale Operations Manager
- Administering SF Sybase CE and its components
- Administering SF Sybase CE
- Setting the environment variables for SF Sybase CE
- Starting or stopping SF Sybase CE on each node
- Applying operating system updates on SF Sybase CE nodes
- Adding storage to an SF Sybase CE cluster
- Recovering from storage failure
- Enhancing the performance of SF Sybase CE clusters
- Verifying the nodes in an SF Sybase CE cluster
- Administering VCS
- Viewing available Veritas device drivers
- Starting and stopping VCS
- Environment variables to start and stop VCS modules
- Adding and removing LLT links
- Configuring aggregated interfaces under LLT
- Displaying the cluster details and LLT version for LLT links
- Configuring destination-based load balancing for LLT
- Enabling and disabling intelligent resource monitoring for agents manually
- Administering the AMF kernel driver
- Administering I/O fencing
- About administering I/O fencing
- About the vxfentsthdw utility
- General guidelines for using the vxfentsthdw utility
- About the vxfentsthdw command options
- Testing the coordinator disk group using the -c option of vxfentsthdw
- Performing non-destructive testing on the disks using the -r option
- Testing the shared disks using the vxfentsthdw -m option
- Testing the shared disks listed in a file using the vxfentsthdw -f option
- Testing all the disks in a disk group using the vxfentsthdw -g option
- Testing a disk with existing keys
- About the vxfenadm utility
- About the vxfenclearpre utility
- About the vxfenswap utility
- Enabling or disabling the preferred fencing policy
- About I/O fencing log files
- Administering CVM
- Establishing CVM cluster membership manually
- Changing the CVM master manually
- Importing a shared disk group manually
- Deporting a shared disk group manually
- Verifying if CVM is running in an SF Sybase CE cluster
- Verifying CVM membership state
- Verifying the state of CVM shared disk groups
- Verifying the activation mode
- Administering CFS
- Administering the Sybase agent
- Sybase agent functions
- Monitoring options for the Sybase agent
- Using the IPC Cleanup feature for the Sybase agent
- Configuring the service group Sybase using the command line
- Bringing the Sybase service group online
- Taking the Sybase service group offline
- Modifying the Sybase service group configuration
- Viewing the agent log for Sybase
- Administering SF Sybase CE
- Troubleshooting SF Sybase CE
- About troubleshooting SF Sybase CE
- Restarting the installer after a failed network connection
- Installer cannot create UUID for the cluster
- Troubleshooting I/O fencing
- The vxfentsthdw utility fails when SCSI TEST UNIT READY command fails
- Node is unable to join cluster while another node is being ejected
- System panics to prevent potential data corruption
- Cluster ID on the I/O fencing key of coordinator disk does not match the local cluster's ID
- Fencing startup reports preexisting split-brain
- Registered keys are lost on the coordinator disks
- Replacing defective disks when the cluster is offline
- Troubleshooting Cluster Volume Manager in SF Sybase CE clusters
- Restoring communication between host and disks after cable disconnection
- Shared disk group cannot be imported in SF Sybase CE cluster
- Error importing shared disk groups in SF Sybase CE cluster
- Unable to start CVM in SF Sybase CE cluster
- CVM group is not online after adding a node to the SF Sybase CE cluster
- CVMVolDg not online even though CVMCluster is online in SF Sybase CE cluster
- Shared disks not visible in SF Sybase CE cluster
- Troubleshooting interconnects
- Troubleshooting Sybase ASE CE
- Prevention and recovery strategies
- Prevention and recovery strategies
- Verification of GAB ports in SF Sybase CE cluster
- Examining GAB seed membership
- Manual GAB membership seeding
- Evaluating VCS I/O fencing ports
- Verifying normal functioning of VCS I/O fencing
- Managing SCSI-3 PR keys in SF Sybase CE cluster
- Identifying a faulty coordinator LUN
- Starting shared volumes manually
- Listing all the CVM shared disks
- I/O Fencing kernel logs
- Prevention and recovery strategies
- Tunable parameters
- Appendix A. Error messages
About the vxfenswap utility
The vxfenswap utility allows you to add, remove, and replace coordinator points in a cluster that is online. The utility verifies that the serial number of the new disks are identical on all the nodes and the new disks can support I/O fencing.
The utility uses SSH, RSH, or hacli for communication between nodes in the cluster. Before you execute the utility, ensure that communication between nodes is set up in one these communication protocols.
Refer to the vxfenswap(1M) manual page.
See the Storage Foundation for Sybase ASE CE Configuration Guide for details on the I/O fencing requirements.
You can replace the coordinator disks without stopping I/O fencing in the following cases:
The disk becomes defective or inoperable and you want to switch to a new disk group.
See Replacing I/O fencing coordinator disks when the cluster is online.
See Replacing the coordinator disk group in a cluster that is online.
If you want to replace the coordinator disks when the cluster is offline, you cannot use the vxfenswap utility. You must manually perform the steps that the utility does to replace the coordinator disks.
The keys that are registered on the coordinator disks are lost.
In such a case, the cluster might panic when a network partition occurs. You can replace the coordinator disks with the same disks using the vxfenswap command. During the disk replacement, the missing keys register again without any risk of data corruption.
If the vxfenswap operation is unsuccessful, then you can use the -a cancel of the vxfenswap command to manually roll back the changes that the vxfenswap utility does.
For disk-based fencing, use the vxfenswap -g diskgroup -a cancel command to cancel the vxfenswap operation.
You must run this command if a node fails during the process of disk replacement, or if you aborted the disk replacement.