### 23.6.15 INFORMATION\_SCHEMA Tables for NDB Cluster

 Two [`INFORMATION_SCHEMA`](information-schema.html) tables provide information that is of particular use when managing an NDB Cluster. The [`FILES`](information-schema-files-table.html) table provides information about NDB Cluster Disk Data files (see [Section 23.6.10.1, “NDB Cluster Disk Data Objects”](mysql-cluster-disk-data-objects.html)). The [`ndb_transid_mysql_connection_map`](information-schema-ndb-transid-mysql-connection-map-table.html) table provides a mapping between transactions, transaction coordinators, and API nodes.

 Additional statistical and other data about NDB Cluster transactions, operations, threads, blocks, and other aspects of performance can be obtained from the tables in the [`ndbinfo`](mysql-cluster-ndbinfo.html) database. For information about these tables, see [Section 23.6.14, “ndbinfo: The NDB Cluster Information Database”](mysql-cluster-ndbinfo.html).

