https://dev.mysql.com/mysql-cluster-disk-data-symlinks.html
The performance of an NDB Cluster that uses Disk Data storage can be greatly improved by separating the data node file system from any tablespace files (undo log files and data files), and placing these on different disks. In early versions of NDB ...
https://dev.mysql.com/mysql-cluster-ndbinfo-cluster-operations.html
The cluster_operations table provides a per-operation (stateful primary key op) view of all activity in the NDB Cluster from the point of view of the local data management (LQH) blocks (see The DBLQH Block). The following table provides information ...
https://dev.mysql.com/mysql-cluster-ndbinfo-counters.html
Such reads are “simple” from the point of view of the TC block; since they hold no locks they are not durable, and once DBTC has routed them to the relevant LQH block, it holds no state for them. The counters table provides running totals of ...
https://dev.mysql.com/mysql-cluster-ndbinfo-tc-time-track-stats.html
transaction_errors integer Based on duration of failing transactions from start to point of failure, tracked against the API or data nodes requesting them. The tc_time_track_stats table provides time-tracking information obtained from the DBTC ...
https://dev.mysql.com/mysql-cluster-ndbinfo-threadstat.html
Since this table contains counts taken at a given point in time, for best results it is necessary to query this table periodically and store the results in an intermediate table or tables. The threadstat table provides a rough snapshot of ...
https://dev.mysql.com/mysql-cluster-option-tables.html
Ndb_system_name: Configured cluster system name; empty if server not connected to NDB ndb_table_no_logging: NDB tables created when this setting is enabled are not checkpointed to disk (although table schema files are created). The following table ...
https://dev.mysql.com/mysql-cluster-options-variables.html
ndb_table_no_logging Property Value System Variable ndb_table_no_logging Scope Session Dynamic Yes SET_VAR Hint Applies No Type Boolean Default Value OFF When this variable is set to ON or 1, it causes NDB tables not to be checkpointed to disk.
https://dev.mysql.com/mysql-cluster-overview-requirements.html
For enhanced reliability, you can use dual switches and dual cards to remove the network as a single point of failure; many device drivers support failover for such communication links. Data node recovery requires synchronization of the failed ...
https://dev.mysql.com/mysql-cluster-overview.html
NDB Cluster is designed not to have any single point of failure. NDB Cluster is a technology that enables clustering of in-memory databases in a shared-nothing system. The shared-nothing architecture enables the system to work with very inexpensive ...
https://dev.mysql.com/mysql-cluster-privilege-distribution.html
Because distributed schema change operations are performed synchronously, the next distributed schema change following a change to any distributed user or users serves as a synchronization point. NDB 8.0.18 introduces a new mechanism for sharing ...
