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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-backup-concepts.html
A backup is a snapshot of the database at a given time. The data actually stored in the database tables at the time that the backup was made Transaction log. A sequential record telling how and when data was stored in the database Each of these ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-basics.html
There are as many data nodes as there are fragment replicas, times the number of fragments (see Section 25.2.2, “NDB Cluster Nodes, Node Groups, Fragment Replicas, and Partitions”). More specific to NDB Cluster, a checkpoint is a point in time ... NDBCLUSTER (also known as NDB) is an in-memory storage engine offering high-availability and data-persistence ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndb-innodb-engines.html
The NDB storage engine is implemented using a distributed, shared-nothing architecture, which causes it to behave differently from InnoDB in a number of ways. For those unaccustomed to working with NDB, unexpected behaviors can arise due to its ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-diskstat.html
The diskstat table provides information about writes to Disk Data tablespaces during the past 1 second.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-diskstats-1sec.html
The diskstats_1sec table provides information about writes to Disk Data tablespaces over the past 20 seconds.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-memory-per-fragment.html
In the memory_per_fragment table, we can see that ordered indexes allocate only fixed-size pages, so as usual the relevant columns from this table are as listed here: fixed_elem_alloc_bytes: This is equal to 32768 times the number of fixed-size ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-operations-per-fragment.html
The table_id column value is unique at any given time, but can be reused if the corresponding object has been deleted. The operations_per_fragment table provides information about the operations performed on individual fragments and fragment ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-params-api.html
ConnectBackoffMaxTime: Specifies longest time in milliseconds (~100ms resolution) to allow between connection attempts to any given data node by this API node. Excludes time elapsed while connection attempts are ongoing, which in worst case can take ... The listing in this section provides information about parameters used in the [mysqld] and [api] sections of a config.ini file for configuring NDB Cluster SQL nodes and API ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-blob-tool.html
It is sometimes useful in diagnosing and repairing corrupted or damaged NDB tables containing BLOB or TEXT columns. --connect-retries Command-Line Format --connect-retries=# Type Integer Default Value 12 Minimum Value 0 Maximum Value 12 Number of ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-delete-all.html
--connect-retries Command-Line Format --connect-retries=# Type Integer Default Value 12 Minimum Value 0 Maximum Value 12 Number of times to retry connection before giving up. In some cases, this can be much faster than DELETE or even TRUNCATE TABLE.