---
title: RDS instances should be configured to use multiple Availability Zones
description: Datadog, the leading service for cloud-scale monitoring.
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  Docs > Datadog Security > OOTB Rules > RDS instances should be configured to
  use multiple Availability Zones
---

> For the complete documentation index, see [llms.txt](https://docs.datadoghq.com/llms.txt).

# RDS instances should be configured to use multiple Availability Zones
 
## Description{% #description %}

Configure Amazon RDS DB instances with Multi-AZ deployments. In a Multi-AZ deployment, Amazon RDS maintains a synchronous standby in a different Availability Zone and fails over to it automatically during an outage or maintenance.

This rule does not evaluate instances that belong to a DB cluster, including Amazon Aurora, Amazon DocumentDB, Amazon Neptune, and Multi-AZ DB cluster deployments, because their availability is configured on the cluster.

## Remediation{% #remediation %}

Follow the [Modifying a DB instance to be a Multi-AZ DB instance deployment](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.MultiAZSingleStandby.html#Concepts.MultiAZ.Migrating) section of the Amazon RDS User Guide.