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MariaDB MaxScale serves as the load balancer in certain MariaDB SkySQL topologies.
MariaDB SkySQL supports MaxScale Redundancy as an option at time of launch:
This feature is not enabled by default. By default, topologies that use MaxScale contain only one MaxScale node.
When MaxScale Redundancy is selected, MaxScale nodes are deployed in a highly available (HA) active-active configuration behind round robin load balancing.
When MaxScale Redundancy is enabled, MaxScale instance size can be selected.
MaxScale Redundancy is available to Power Tier customers.
Distributed Transactions, launched with 3 or more Xpand nodes
Single Node Analytics
Enable MaxScale Redundancy
Launch a SkySQL service:
Check the "Enable MaxScale Redundancy" checkbox.
For Multi-Node Distributed Transactions topology, choose the number of MaxScale nodes. Two to five nodes can be selected for increased fault tolerance and scaling of maximum concurrent connections.
For all other topologies, two MaxScale nodes will be deployed when MaxScale redundancy is enabled.
Choose the MaxScale instance size