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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-counters.html
A primary-key read counts as one operation, as does a primary-key update. The counters table provides running totals of events such as reads and writes for specific kernel blocks and data nodes. Counts are kept from the most recent node start or ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-foreign-keys.html
The foreign_keys table provides information about foreign keys on NDB tables.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-memory-per-fragment.html
Each variable-sized page is reorganized as needed to fit the changing size of variable-sized row parts as they are inserted, updated, and deleted; if a given row part grows too large for the page it is in, it can be moved to a different page.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-server-operations.html
(Currently, the MySQL Server does not expose the NDB API transaction ID of an ongoing transaction.) The operation_type column can take any one of the values READ, READ-SH, READ-EX, INSERT, UPDATE, DELETE, WRITE, UNLOCK, REFRESH, SCAN, SCAN-SH, ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-table-distribution-status.html
The table_distribution_status table provides information about the progress of table distribution for NDB tables. is_reorg_ongoing Whether the table is currently being reorganized (1 if true) .
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-overview-requirements.html
NDB Cluster requires communication between data nodes and API nodes (including SQL nodes), as well as between data nodes and other data nodes, to execute queries and updates. One of the strengths of NDB Cluster is that it can be run on commodity ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-overview.html
Thus, in a payroll application storing data in a cluster, if one application updates the salary of an employee, all other MySQL servers that query this data can see this change immediately. NDB Cluster is a technology that enables clustering of ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-privilege-synchronization.html
Prior to NDB 8.0.27, changes to users with NDB_STORED_USER were updated in a completely asynchronous fashion, without any locks being taken. NDB 8.0 introduces a new mechanism for sharing and synchronizing users, roles, and privileges between SQL ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-desc.html
ndb_desc provides a detailed description of one or more NDB tables. Usage ndb_desc -c connection_string tbl_name -d db_name [options] ndb_desc -c connection_string index_name -d db_name -t tbl_name Additional options that can be used with ndb_desc ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndbd.html
In a multi-processor system performing a large number of operations (including updates), the ndbd process can consume up to 2 CPUs if permitted to do so. The ndbd binary provides the single-threaded version of the process that is used to handle all ...