Group Changes with MariaDB Xpand
This page is part of MariaDB's Documentation.
The parent of this page is: Consistency, Fault Tolerance, and Availability with MariaDB Xpand
Overview
MariaDB Xpand performs a group change when the cluster detects a change in cluster membership:
Xpand maintains a set of all nodes that can currently communicate with each other, which is referred to as the group
Xpand performs a group change when a node is added to or removed from the group
Group changes have many causes, including scale up/down operations, node or zone failures, or failed heartbeat checks
The duration of a group change is typically a few seconds
Xpand performs many types of actions during a group change, such as recalculating quorum and ensuring fault tolerance
When Xpand performs a group change, it can have an impact on transactions, queries, and connections