6.7
Table Of Contents
- vSphere Availability
- Contents
- About vSphere Availability
- Business Continuity and Minimizing Downtime
- Creating and Using vSphere HA Clusters
- Providing Fault Tolerance for Virtual Machines
- How Fault Tolerance Works
- Fault Tolerance Use Cases
- Fault Tolerance Requirements, Limits, and Licensing
- Fault Tolerance Interoperability
- Preparing Your Cluster and Hosts for Fault Tolerance
- Using Fault Tolerance
- Best Practices for Fault Tolerance
- Legacy Fault Tolerance
- Troubleshooting Fault Tolerant Virtual Machines
- Hardware Virtualization Not Enabled
- Compatible Hosts Not Available for Secondary VM
- Secondary VM on Overcommitted Host Degrades Performance of Primary VM
- Increased Network Latency Observed in FT Virtual Machines
- Some Hosts Are Overloaded with FT Virtual Machines
- Losing Access to FT Metadata Datastore
- Turning On vSphere FT for Powered-On VM Fails
- FT Virtual Machines not Placed or Evacuated by vSphere DRS
- Fault Tolerant Virtual Machine Failovers
- vCenter High Availability
- Plan the vCenter HA Deployment
- Configure the Network
- Configure vCenter HA With the Basic Option
- Configure vCenter HA With the Advanced Option
- Manage the vCenter HA Configuration
- Set Up SNMP Traps
- Set Up Your Environment to Use Custom Certificates
- Manage vCenter HA SSH Keys
- Initiate a vCenter HA Failover
- Edit the vCenter HA Cluster Configuration
- Perform Backup and Restore Operations
- Remove a vCenter HA Configuration
- Reboot All vCenter HA Nodes
- Change the Appliance Environment
- Collecting Support Bundles for a vCenter HA Node
- Troubleshoot Your vCenter HA Environment
- Patching a vCenter High Availability Environment
- Using Microsoft Clustering Service for vCenter Server on Windows High Availability
Use the Turn Off Fault Tolerance option if you do not plan to reenable the feature. Otherwise, use the
Suspend Fault Tolerance option.
Note If the Secondary VM resides on a host that is in maintenance mode, disconnected, or not
responding, you cannot use the Turn Off Fault Tolerance option. In this case, you should suspend and
resume Fault Tolerance instead.
Procedure
1 In the vSphere Client, browse to the virtual machine for which you want to turn off Fault Tolerance.
2 Right-click the virtual machine and select Fault Tolerance > Turn Off Fault Tolerance.
3 Click Yes.
Fault Tolerance is turned off for the selected virtual machine. The history and the secondary virtual
machine for the selected virtual machine are deleted.
Note Fault Tolerance cannot be turned off when the secondary VM is in the process of being started.
Since this involves syncing up the primary VM's full state to the secondary VM, this process may take
longer than expected.
Suspend Fault Tolerance
Suspending vSphere Fault Tolerance for a virtual machine suspends its Fault Tolerance protection, but
preserves the Secondary VM, its configuration, and all history. Use this option to resume Fault Tolerance
protection in the future.
Procedure
1 In the vSphere Client, browse to the virtual machine for which you want to suspend Fault Tolerance.
2 Right-click the virtual machine and select Fault Tolerance > Suspend Fault Tolerance.
3 Click Yes.
Fault Tolerance is suspended for the selected virtual machine. Any history and the Secondary VM for the
selected virtual machine are preserved and will be used if the feature is resumed.
What to do next
After you suspend Fault Tolerance, to resume the feature select Resume Fault Tolerance.
Migrate Secondary
After vSphere Fault Tolerance is turned on for a Primary VM, you can migrate its associated Secondary
VM.
Procedure
1 In the vSphere Client, browse to the Primary VM for which you want to migrate its Secondary VM.
vSphere Availability
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