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These events relate to Cluster errors and warnings. The presence of one or more of these generally indicates that a major malfunction or failure has occurred. 

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## INFO Events 

These events provide general information about the state of the cluster and activities associated with Cluster maintenance, such as logging and heartbeat transmission. 

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## SINGLEUSER Events 

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These events are associated with entering and exiting single user mode. 

## Note 

SentHeartbeat  events are available only if NDB Cluster was compiled with VM_TRACE  enabled. 

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## BACKUP Events 

These events provide information about backups being created or restored. 

