# MaxScale Redundancy

MariaDB MaxScale serves as the load balancer in certain MariaDB Cloud topologies.

MariaDB Cloud 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.

## Compatibility

* Replicated Transactions `{{space.vars.server}}`

## Enable MaxScale Redundancy

1. Launch a MariaDB Cloud service:
2. Check the "Enable MaxScale Redundancy" checkbox.
3. Choose the [MaxScale instance size](/docs/mariadb-cloud/reference/mariadb-cloud-instance-sizes.md)


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