ndb_desc — Describe NDB Tables Number of attributes: 4 Number of primary keys: 1 Length of frm data: 1001 Max Rows: 0 Row Checksum: 1 Row GCI: 1 SingleUserMode: 0 ForceVarPart: 1 PartitionCount: 2 FragmentCount: 2 PartitionBalance: FOR_RP_BY_LDM ExtraRowGciBits: 0 ExtraRowAuthorBits: 0 TableStatus: Retrieved Table options: readbackup HashMap: DEFAULT-HASHMAP-3840-2 Tablespace id: 16 Tablespace: ts_1 -- Attributes -- id Int PRIMARY KEY DISTRIBUTION KEY AT=FIXED ST=MEMORY AUTO_INCR name Varchar(80;utf8mb4_0900_ai_ci) NOT NULL AT=SHORT_VAR ST=MEMORY length_mm Int NOT NULL AT=FIXED ST=DISK weight_gm Int NOT NULL AT=FIXED ST=DISK -- Indexes -- PRIMARY KEY(id) - UniqueHashIndex PRIMARY(id) - OrderedIndex uk(name) - OrderedIndex uk$unique(name) - UniqueHashIndex -- Per partition info -- Partition Row count Commit count Frag fixed memory Frag varsized memory Extent_space 0 2 2 32768 32768 1048576 1 4 4 32768 32768 1048576 NDBT_ProgramExit: 0 - OK This means that 1048576 bytes are allocated from the tablespace for this table on each partition, of which 1044440 bytes remain free for additional storage. In other words, 1048576 - 1044440 = 4136 bytes per partition is currently being used to store the data from this table’s disk-based columns. The number of bytes shown as  Free extent_space  is available for storing on-disk column data from the  fish  table only; for this reason, it is not visible when selecting from the  INFORMATION_SCHEMA.FILES  table. Tablespace id  and  Tablespace  are displayed for Disk Data tables beginning with NDB 8.0.21. For fully replicated tables,  ndb_desc  shows only the nodes holding primary partition fragment replicas; nodes with copy fragment replicas (only) are ignored. You can obtain such information, using the mysql  client, from the  table_distribution_status ,  table_fragments ,  table_info , and table_replicas  tables in the  ndbinfo  database. All options that can be used with  ndb_desc  are shown in the following table. Additional descriptions follow the table. Table 23.31 Command-line options used with the program ndb_desc Format Description Added, Deprecated, or Removed --auto-inc , -a Show next value for AUTO_INCREMENT oolumn if table has one ADDED: NDB 8.0.21 --blob-info , -b Include partition information for BLOB tables in output. Requires that the -p option also be used (Supported in all NDB releases based on MySQL 8.0) 4302