Add Standby Node

In a database cluster, standby nodes store a copy of the primary node's data. The data of the standby node is always synced with the primary node so that if there is a problem with the primary node, it can be replaced automatically. This replacement happens in the fastest possible time and with the least downtime.

Currently, each database cluster can have only one standby node.

To add a standby node to the cluster, just specify its number when creating a new cluster in the "High Availability" section.

All Arvancloud database clusters have an automatic failover mechanism and when an error occurs in the primary node, it will be replaced with another node. However, to achieve High Availability and reduce service recovery time, it is highly recommended to add a standby node to your cluster.

If you do not add a standby node to the cluster and the primary node fails, the cluster will be unavailable until the replaced node is activated. This time can vary based on the amount of data in your cluster, and the larger the data, the longer the cluster recovery time.