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How to automatically manage failover of the MySQL database?
Managing your automatic failover for your Moodle database must at least require a virtual IP (VIP) as your endpoint for your Moodle application client interfacing your database backend. To do this, you can deploy Keepalived with HAProxy (or ProxySQL–depends on your load balancer choice) on top of it.
MySQL replication setups are inevitably related to failovers. Unlike multi-master clusters like Galera, there is one single writer in a whole setup – the master. If the master fails, one of the slaves will have to take its role through the process of failover. Such process is tricky and potentially, it may cause data loss.
How does Azure database for MySQL high availability work?
In the event of failover, Azure Database for MySQL flexible server automatically fails over to the standby replica if high availability is enabled. The high availability setup monitors the primary server and bring it back online. Clients always connect to the primary database server.
How to enable or disable automatic failover in clustercontrol?
Failover in ClusterControl can be configured to be automatic or not. If you prefer to take care of failover manually, you can disable automated cluster recovery. By default, cluster recovery is enabled and automated failover is used.
How does MySQL Connector / J support server failover?
MySQL Connector/J supports server failover. A failover happens when connection-related errors occur for an underlying, active connection. The connection errors are, by default, propagated to the client, which has to handle them by, for example, recreating the working objects (Statement, ResultSet, etc.) and restarting the processes.
What does failover mean in MySQL replication?
The rest of the replication topology may also have to change – remaining replicas should change their master from the old, failed node to the newly chosen one. This process of “promoting” a replica to become a master after the old master has failed is called “failover”.