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https://dev.mysql.com/doc/refman/8.4/en/group-replication-observability.html
There is a lot of automation built into the Group Replication plugin. Nonetheless, you might sometimes need to understand what is happening behind the scenes. This is where the instrumentation of Group Replication and Performance Schema becomes ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-online-upgrade-combining-versions.html
Group Replication is versioned according to the MySQL Server version that the Group Replication plugin was bundled with. For example, if a member is running MySQL 8.4.6 then that is the version of the Group Replication plugin. For optimal ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-performance-message-fragmentation.html
When an abnormally large message is sent between Group Replication group members, it can result in some group members being reported as failed and expelled from the group. This is because the single thread used by Group Replication's group ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-performance.html
Group Replication is designed to create fault-tolerant systems with built-in failure detection and automated recovery. If a member server instance leaves voluntarily or stops communicating with the group, the remaining members agree a ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-replication-technologies.html
Before getting into the details of MySQL Group Replication, this section introduces some background concepts and an overview of how things work. This provides some context to help understand what is required for Group Replication and what the ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-responses-failure-rejoin.html
The group_replication_autorejoin_tries system variable makes a member that has been expelled or reached its unreachable majority timeout try to rejoin the group automatically. The default (3), means that the member automatically makes 3 attempts to ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-restarting-group.html
Group Replication is designed to ensure that the database service is continuously available, even if some of the servers that form the group are currently unable to participate in it due to planned maintenance or unplanned issues. As long as the ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-summary.html
Group Replication is a technique that can be used to implement fault-tolerant systems. A replication group is a set of servers, each of which has a complete copy of the data (a shared-nothing replication scheme), which interact with each other ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-understanding-consistency-guarantees.html
In terms of distributed consistency guarantees, either in normal or failure repair operations, Group Replication has always been an eventual consistency system. This means that as soon as the incoming traffic slows down or stops, all group members ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-use-cases.html
Group Replication enables you to create fault-tolerant systems with redundancy by replicating the system state to a set of servers. Even if some of the servers subsequently fail, as long it is not all or a majority, the system is still available.