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https://dev.mysql.com/doc/refman/8.0/en/group-replication-compatibility-communication.html
A replication group uses a Group Replication communication protocol version that can differ from the MySQL Server version of the members. To check the group's communication protocol version, issue the following statement on any member: SELECT ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-functions-for-maximum-consensus.html
The following functions enable you to inspect and configure the maximum number of consensus instances that a group can execute in parallel. group_replication_get_write_concurrency() Check the maximum number of consensus instances that a group can ...Default value is 10, valid values are integers in the range of 10 to ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-deploying-in-single-primary-mode.html
Each of the MySQL server instances in a group can run on an independent physical host machine, which is the recommended way to deploy Group Replication. This section explains how to create a replication group with three MySQL Server instances, each ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-functions-for-new-primary.html
The following function enables you to set a member of a single-primary replication group to take over as the primary. The current primary becomes a read-only secondary, and the specified group member becomes the read-write primary. The function can ...This function replaces the usual primary election process; see Section 20.5.1.1, “Changing the Primary”, for more ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-functions.html
The functions described in the following sections are used with Group Replication.
https://dev.mysql.com/doc/refman/8.0/en/resource-group-statements.html
MySQL supports creation and management of resource groups, and permits assigning threads running within the server to particular groups so that threads execute according to the resources available to the group. This section describes the SQL ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-launching.html
It is first necessary to ensure that the Group Replication plugin is installed on server s1. If you used plugin_load_add='group_replication.so' in the option file then the Group Replication plugin is already installed, and you can proceed to the ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-upgrade-with-mysqlbackup.html
As part of a provisioning approach you can use MySQL Enterprise Backup to copy and restore the data from a group member to new members. This process consists of: Take a backup from a member of the older group using mysqlbackup. Then join the ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-online-upgrade.html
When you have a group running which you want to upgrade but you need to keep the group online to serve your application, you need to consider your approach to the upgrade. This section describes the different elements involved in an online upgrade, ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-status-variables.html
MySQL 8.0 supports one status variable providing information about Group Replication. This variable is described here: group_replication_primary_member Shows the primary member's UUID when the group is operating in single-primary mode. If the group ...