MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
This table provides information about NDB Cluster log space usage.
        The logspaces table contains the following
        columns:
      
            node_id
          
The ID of this data node.
            log_type
          
            Type of log; one of: REDO or
            DD-UNDO.
          
            log_id
          
            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
          
            log_part
          
The log part number.
            total
          
Total space available for this log.
            used
          
Space used by this log.