MySQL Server Using InnoDB Compared with NDB Cluster • Ndb_api_table_scan_count_slave : Number of table scans that have been started, including scans of internal tables, by this replica. Deprecated in NDB 8.0.23. • Ndb_api_trans_abort_count_slave : Number of transactions aborted by this replica. Deprecated in NDB 8.0.23. • Ndb_api_trans_close_count_slave : Number of transactions aborted (may be greater than sum of TransCommitCount and TransAbortCount) by this replica. Deprecated in NDB 8.0.23. • Ndb_api_trans_commit_count_slave : Number of transactions committed by this replica. Deprecated in NDB 8.0.23. • Ndb_api_trans_local_read_row_count_slave : Total number of rows that have been read by this replica. Deprecated in NDB 8.0.23. • Ndb_api_trans_start_count_slave : Number of transactions started by this replica. Deprecated in NDB 8.0.23. • Ndb_api_uk_op_count_slave : Number of operations based on or using unique keys by this replica. Deprecated in NDB 8.0.23. • Ndb_api_wait_exec_complete_count_slave : Number of times thread has been blocked while waiting for operation execution to complete by this replica. Deprecated in NDB 8.0.23. • Ndb_api_wait_meta_request_count_slave : Number of times thread has been blocked waiting for metadata-based signal by this replica. Deprecated in NDB 8.0.23. • Ndb_api_wait_nanos_count_slave : Total time (in nanoseconds) spent waiting for some type of signal from data nodes by this replica. Deprecated in NDB 8.0.23. • Ndb_api_wait_scan_result_count_slave : Number of times thread has been blocked while waiting for scan-based signal by this replica. Deprecated in NDB 8.0.23. • Ndb_metadata_blacklist_size : Number of NDB metadata objects that NDB binlog thread has failed to synchronize; renamed in NDB 8.0.22 as Ndb_metadata_excluded_count. Deprecated in NDB 8.0.21. • Ndb_replica_max_replicated_epoch : Most recently committed NDB epoch on this replica. When this value is greater than or equal to Ndb_conflict_last_conflict_epoch, no conflicts have yet been detected. Deprecated in NDB 8.0.23. • ndb_slave_conflict_role : Role for replica to play in conflict detection and resolution. Value is one of PRIMARY, SECONDARY, PASS, or NONE (default). Can be changed only when replication SQL thread is stopped. See documentation for further information. Deprecated in NDB 8.0.23. • Ndb_metadata_blacklist_size : Number of NDB metadata objects that NDB binlog thread has failed to synchronize; renamed in NDB 8.0.22 as Ndb_metadata_excluded_count. Removed in NDB 8.0.22. Options and Variables Removed in NDB 8.0 23.1.6 MySQL Server Using InnoDB Compared with NDB Cluster The following system variables, status variables, and options have been removed in NDB 8.0. MySQL Server offers a number of choices in storage engines. Since both  NDB  and  InnoDB  can serve as transactional MySQL storage engines, users of MySQL Server sometimes become interested in NDB Cluster. They see  NDB  as a possible alternative or upgrade to the default  InnoDB  storage engine in 3961