ndbinfo: The NDB Cluster Information Database The log part number Total space available for this log Space used by this log logbuffers  table rows reflecting two additional log types are available when performing an NDB backup. One of these rows has the log type  BACKUP-DATA , which shows the amount of data buffer used during backup to copy fragments to backup files. The other row has the log type  BACKUP-LOG , which displays the amount of log buffer used during the backup to record changes made after the backup has started. One each of these  log_type  rows is shown in the  logbuffers  table for each data node in the cluster. These rows are not present unless an NDB backup is currently being performed. This table provides information about NDB Cluster log space usage. The  logspaces  table contains the following columns: The ID of this data node. Type of log; one of:  REDO  or  DD-UNDO . The log ID; for Disk Data undo log files, this is the same as the value shown in the LOGFILE_GROUP_NUMBER  column of the  INFORMATION_SCHEMA.FILES  table, as well as the value shown for the  log_id  column of the  ndbinfo logbuffers  table The log part number. Total space available for this log. Space used by this log. The  membership  table describes the view that each data node has of all the others in the cluster, including node group membership, president node, arbitrator, arbitrator successor, arbitrator connection states, and other information. The  membership  table contains the following columns: 4560 • total • used • node_id • log_type • node_id • log_part • total • used Notes 23.5.14.34 The ndbinfo logspaces Table 23.5.14.35 The ndbinfo membership Table