Cluster Witness Functionality
Applies To: Windows Server 2008 R2
In a cluster with an even number of nodes and a quorum configuration that includes a witness, when the witness remains online, the cluster can sustain failures of half the nodes. If the witness goes offline, the same cluster can sustain failures of half the nodes minus one.
Events
| Event ID | Source | Message |
|---|---|---|
Microsoft-Windows-FailoverClustering |
Cluster service failed to update the cluster configuration data on the witness resource. Please ensure that the witness resource is online and accessible. | |
Microsoft-Windows-FailoverClustering |
The cluster service detected a problem with the witness resource. The witness resource will be failed over to another node within the cluster in an attempt to reestablish access to cluster configuration data. | |
Microsoft-Windows-FailoverClustering |
File share '%1' associated with the file share witness resource is currently hosted by server '%2'. This server '%2' has just been added as a new node within the failover cluster. Hosting of the file share witness by any node comprising the same cluster is not recommended. Please choose a file share witness that is not hosted by any node within the same cluster and modify settings of the file share witness resource accordingly. | |
Microsoft-Windows-FailoverClustering |
File share witness resource '%1' failed a periodic health check on file share '%2'. Please ensure that file share '%2' exists and is accessible by the cluster. | |
Microsoft-Windows-FailoverClustering |
File share witness resource '%1' failed to come online. Please ensure that file share '%2' exists and is accessible by the cluster. | |
Microsoft-Windows-FailoverClustering |
File share witness resource '%1' failed to arbitrate for the file share '%2'. Please ensure that file share '%2' exists and is accessible by the cluster. | |
Microsoft-Windows-FailoverClustering |
Node '%1' failed to form a cluster. This was because the witness was not accessible. Please ensure that the witness resource is online and available. |