# Workload architecture | AOSREL02: How do you provide high availability for your OpenSearch Service domain? | | --- | | | To protect your OpenSearch Service domain during a service disruption, you can deploy nodes across two or three Availability Zones within the same Region. This configuration, known as Multi-AZ, leverages isolated locations called Availability Zones within each AWS Region. You can also choose to deploy OpenSearch with Multi-AZ with Standby deployment to protect against infrastructure failures. Enabling Multi-AZ with Standby deployment increases the availability of your domain to 99.99%. | AOSREL03: How do you monitor quotas and limits in your OpenSearch Service domain? | | --- | | | Cloud providers have built-in usage constraints that prevent excessive resource utilization. Understanding and monitoring these quotas is essential to prevent scaling issues and ensure uninterrupted service operations. | AOSREL04: How do you recover your OpenSearch Service domains from outages? | | --- | | | Disaster recovery involves plans and processes to resume operations and restore data in the aftermath of a disruptive event or catastrophe. Having a disaster recovery plan is important to recover from any disruptions to the OpenSearch domain. | AOSREL05: How do you use reliable instances for your production search workloads? | | --- | | | Business-critical workloads demand enough resources in production environments to handle reliability, stability, and high performance. In contrast, dev environments can function on minimal resources without impacting critical operations. **Topics** + [AOSREL02-BP01 Create Multi-AZ with Standby OpenSearch Service domains](aosrel02-bp01.md) + [AOSREL03-BP01 Regularly review your OpenSearch Service quotas](aosrel03-bp01.md) + [AOSREL04-BP01 Implement a disaster recovery (DR) strategy for your OpenSearch Service for business continuity](aosrel04-bp01.md) + [AOSREL04-BP02 Implement an Index State Management (ISM) policy to generate snapshots for your crucial indices](aosrel04-bp02.md) + [AOSREL04-BP03 Enable index replication for your critical indices](aosrel04-bp03.md) + [AOSREL04-BP04 Employ cross-cluster replication to achieve higher availability](aosrel04-bp04.md) + [AOSREL05-BP01 Implement appropriate compute sizing for production workloads](aosrel05-bp01.md)