NDB Cluster Log Messages Log Message Description Event Name Event Type Priority Severity single user mode Node API_node_id has exclusive access ,  Node node_id : Entering single user mode is the node ID of the API or SQL having exclusive access to the cluster (for more information, see Section 23.5.6, “NDB Cluster Single User Mode” ); the message Unknown single user report API_node_id indicates an error has taken place and should never be seen in normal operation Node node_id : Backup backup_id started from node mgm_node_id A backup has been started using the management node having mgm_node_id ; this message is also displayed in the cluster management client when the START BACKUP command is issued; for more information, see Section 23.5.8.2, “Using The NDB Cluster Management Client to Create a Backup” BackupStarted Backup 7 INFO Node node_id : Backup backup_id started from node mgm_node_id completed. StartGCP: The backup having the ID backup_id  has been completed; for more information, see Section 23.5.8.2, “Using The NDB Cluster BackupCompleted Backup 7 INFO 4458