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https://dev.mysql.com/doc/refman/8.4/en/replication-multi-source-monitoring.html
To monitor the connection status of all channels: mysql> SELECT * FROM replication_connection_status\G; *************************** 1. To monitor the connection status of a named channel, use a WHERE CHANNEL_NAME=channel clause: mysql> SELECT * FROM ... To monitor the status of replication channels the following options exist: Using the replication Performance Schema ...
https://dev.mysql.com/doc/refman/8.4/en/replication-options.html
If the server ID is set to 0, binary logging takes place, but a source with a server ID of 0 refuses any connections from replicas, and a replica with a server ID of 0 refuses to connect to a source. The following sections contain information about ...
https://dev.mysql.com/doc/refman/8.4/en/replication-solutions-backups-rawdata.html
If you want to be able to restore the data and operate as a replica (for example, in the event of failure of the replica), in addition to the data, you need to have the replica's connection metadata repository and applier metadata repository, and ...
https://dev.mysql.com/doc/refman/8.4/en/replication-solutions-backups-read-only.html
Note The instructions in this section place the server to be backed up in a state that is safe for backup methods that get the data from the server, such as mysqldump (see Section 6.5.4, “mysqldump — A Database Backup Program”). You should not ...
https://dev.mysql.com/doc/refman/8.4/en/replication-solutions-scaleout.html
Start by creating a wrapper library or module that implements the following functions: safe_writer_connect() safe_reader_connect() safe_reader_statement() safe_writer_statement() safe_ in each function name means that the function takes care of ...
https://dev.mysql.com/doc/refman/8.4/en/replication-solutions-switch.html
Web clients that issue only reads (and would normally be connected to the replicas) are not shown, as they do not need to switch to a new server in the event of failure. To use CHANGE REPLICATION SOURCE TO, add all information about how to connect ... You can tell a replica to change to a new source using the CHANGE REPLICATION SOURCE TO ...
https://dev.mysql.com/doc/refman/8.4/en/replication-threads.html
The source creates a thread to send the binary log contents to a replica when the replica connects. When a START REPLICA statement is issued on a replica server, the replica creates an I/O (receiver) thread, which connects to the source and asks it ... MySQL replication capabilities are implemented using the following types of threads: Binary log dump ...
https://dev.mysql.com/doc/refman/8.4/en/security-plugins.html
MySQL includes several components and plugins that implement security features: Plugins for authenticating attempts by clients to connect to MySQL Server. (MySQL Enterprise Edition only) MySQL Enterprise Audit, implemented using a server plugin, ...
https://dev.mysql.com/doc/refman/8.4/en/server-side-help-support.html
Change location into that directory and process the file with the mysql client as follows: mysql -u root -p mysql < fill_help_tables.sql The command shown here assumes that you connect to the server using an account such as root that has privileges ... MySQL Server supports a HELP statement that returns information from the MySQL Reference Manual (see Section 15.8.3, “HELP ...
https://dev.mysql.com/doc/refman/8.4/en/set-password.html
The new password becomes the primary password, but clients can use the account to connect to the server using either the primary or secondary password. When the read_only system variable is enabled, SET PASSWORD requires the CONNECTION_ADMIN ... SET ...