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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-logs-cluster-log.html
Table 25.53 Common NDB cluster log messages Log Message Description Event Name Event Type Priority Severity Node mgm_node_id: Node data_node_id Connected The data node having node ID node_id has connected to the management server (node mgm_node_id).
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-mysqld.html
The mysqld parameter ndb-connectstring is used to specify the connection string either on the command line when starting mysqld or in my.cnf. The connection string contains the host name or IP address where the management server can be found, as ...
https://dev.mysql.com/doc/refman/8.0/en/show-engine.html
The connection row's Status column contains the name/value pairs described in the following table. The number in the created column is the same as the number of data nodes in the cluster to which the MySQL server has connected. SHOW ENGINE ...
https://dev.mysql.com/doc/refman/8.0/en/account-activity-auditing.html
When a client connects successfully, the server authenticates the client to a particular row in this table. To determine the invoking user, you can call the USER() function, which returns a value indicating the actual user name provided by the ...
https://dev.mysql.com/doc/refman/8.0/en/charset-literal.html
For the simple statement SELECT 'string', the string has the connection default character set and collation defined by the character_set_connection and collation_connection system variables. If _charset_name is not specified but COLLATE ... Every ...
https://dev.mysql.com/doc/refman/8.0/en/clone-plugin-options-variables.html
A greater number of threads can improve cloning performance but also reduces the number of permitted simultaneous client connections, which can affect the performance of existing client connections. Used to configure an encrypted connection for a ...
https://dev.mysql.com/doc/refman/8.0/en/creating-ssl-files-using-openssl.html
A typical error in this case is: ERROR 2026 (HY000): SSL connection error: error:00000001:lib(0):func(0):reason(1) Important If a client connecting to a MySQL server instance uses an SSL certificate with the extendedKeyUsage extension (an X.509 v3 ... This section describes how to use the openssl command to set up SSL certificate and key files for use by MySQL servers and ...
https://dev.mysql.com/doc/refman/8.0/en/default-privileges.html
If the root account has an empty password, your MySQL installation is unprotected: Anyone can connect to the MySQL server as root without a password and be granted all privileges. Choose whichever of the following procedures applies: If the root ...
https://dev.mysql.com/doc/refman/8.0/en/expired-password-handling.html
For example: ALTER USER 'myuser'@'localhost' PASSWORD EXPIRE; For each connection that uses an account with an expired password, the server either disconnects the client or restricts the client to “sandbox mode,” in which the server permits the ... MySQL provides password-expiration capability, which enables database administrators to require that users reset their ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-secure-user.html
To secure the user credentials, you can require SSL for connections with the user account, and (from MySQL 8.0.21) you can provide the user credentials when Group Replication is started, rather than storing them in the replica status tables. State ...