Posted On: May 3, 2023

Today, Amazon OpenSearch Service announces Multi-AZ with Standby, a new deployment option that enables 99.99% availability and consistent performance for business-critical workloads. With Multi-AZ with Standby, OpenSearch Service domains are resilient to potential infrastructure failures, such as a node or an Availability Zone (AZ) failure, while assuring no impact to performance or availability. Multi-AZ with Standby also ensures OpenSearch Service domains follow recommended best practices, simplifying configuration and management.

When Multi-AZ with Standby is enabled, OpenSearch Service reserves nodes in one of the AZs as standby; these nodes do not serve search requests and are primarily used for failover. Amazon OpenSearch Service monitors the underlying infrastructure for failures, and when a failure is identified, automatically promotes the standby nodes to active in less than a minute. OpenSearch Service continues to serve indexing and search requests, and any impact is limited to the time it takes to perform the failover. With Multi-AZ with Standby, there is no re-distribution of data or resources during a failure, thereby ensuring that cluster performance is unaffected during a failover.

When creating or updating an existing Managed Cluster, customers can enable the Multi-AZ with Standby deployment option using the management console, command line interface (CLI), or the software development kit (SDK). Amazon OpenSearch Service creates a domain across three AZs with equal number of nodes in each AZ and reserves nodes in one AZ as standby. In the event of an infrastructure failure, the service automatically fails over to the standby nodes in less than a minute—without requiring any customer action.

Multi-AZ with Standby is available for OpenSearch versions 1.3 and above. For information on Multi-AZ with Standby for Amazon OpenSearch Service, please see documentation.

Multi-AZ for Standby is now available in the Amazon Web Services China (Beijing) Region, operated by Sinnet, and the Amazon Web Services China (Ningxia) Region, operated by NWCD.

To get started with Multi-AZ with Standby, visit the product page.