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Copy file name to clipboardExpand all lines: articles/reliability/concept-redundancy-replication-backup.md
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In an active-passive system, the length of time that it takes to fail over determines the RTO. Commonly, the RTO for an active-passive system is measured in minutes.
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Some replication solutions also support *read-only replicas*, which enables you to read (but not write) data from the passive replicas. This approach can be useful to get more utilization from your replicas, such as when you need to perform analytics or reporting on data without affecting the primary replica that you're using for your application's transactional work. Several Azure services support read-only replicas, including [Azure Storage with the read access GRS (RA-GRS) replication type](../storage/common/storage-redundancy.md#read-access-to-data-in-the-secondary-region), and [Azure SQL active geo-replication](/azure/azure-sql/database/active-geo-replication-overview?view=azuresql&preserve-view=true).
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Some replication solutions also support *read-only replicas*, which enables you to read (but not write) data from the passive replicas. This approach can be useful to get more utilization from your replicas, such as when you need to perform analytics or reporting on data without affecting the primary replica that you're using for your application's transactional work. Several Azure services support read-only replicas, including [Azure Storage with the read access GRS (RA-GRS) replication type](../storage/common/storage-redundancy.md#read-access-to-data-in-the-secondary-region), and [Azure SQL Database active geo-replication](/azure/azure-sql/database/active-geo-replication-overview?view=azuresql&preserve-view=true).
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-**Active-active** replication enables using multiple active replicas for live traffic simultaneously, and any of the replicas can process requests:
Copy file name to clipboardExpand all lines: articles/reliability/overview-reliability-guidance.md
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-*Multi-region support* such as how to configure multi-region or geo-disaster support, traffic routing and data replication between regions, region-down experience, failover and failback support, alternative multi-region support.
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-*Backup support* such as who controls backups, where they are stored, how they can be recovered, and whether they are accessible only within a region or across regions.
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>[!NOTE]
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>Some service documents are in the process of, or are not yet updated into a single reliability guide format. These may contain more than one document that references reliability guidance.
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|Azure VMware Solution|[Deploy disaster recovery using VMware HCX](../azure-vmware/deploy-disaster-recovery-using-vmware-hcx.md?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json)|
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## Containers
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|Azure Service Fabric|[Deploy an Azure Service Fabric cluster across Availability Zones](/azure/service-fabric/service-fabric-cross-availability-zones?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json) </p> [Disaster recovery in Azure Service Fabric](/azure/service-fabric/service-fabric-disaster-recovery?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json)|
|Azure SQLManaged Instance|[Failover groups overview & best practices - Azure SQL Managed Instance](/azure/azure-sql/managed-instance/failover-group-sql-mi?view=azuresql&preserve-view=true)|
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|Azure Database for MySQL|[Overview of business continuity with Azure Database for MySQL - Single Server](/azure/mysql/single-server/concepts-business-continuity?#recover-from-an-azure-regional-data-center-outage)|
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|Azure Database for MySQL - Flexible Server|[Azure Database for MySQL Flexible Server High availability](/azure/mysql/flexible-server/concepts-high-availability?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json) </p>[Azure Database for MySQL Flexible Server - Restore to latest restore point](/azure/mysql/flexible-server/how-to-restore-server-portal?#geo-restore-to-latest-restore-point)|
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|Azure Database for PostgreSQL - Flexible Server|[Reliability in Azure Database for PostgreSQL - Flexible Server](reliability-postgresql-flexible-server.md)|
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|----------|---------|
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|Azure API Center|[Reliability in Azure API Center](reliability-api-center.md)|
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## DevOps
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| Product| Guidance |
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|Azure Logic Apps|[Reliability in Azure Logic Apps](reliability-logic-apps.md)|
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|Azure Service Bus|[Best practices for insulating applications against Service Bus outages and disasters](../service-bus-messaging/service-bus-outages-disasters.md?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json)|
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## Internet of Things
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| Product| Guidance |
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|Azure IoT Hub|[IoT Hub high availability and disaster recovery](../iot-hub/iot-hub-ha-dr.md?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json#disable-disaster-recovery)|
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|Azure Notification Hubs|[Reliability in Azure Notification Hubs](reliability-notification-hubs.md)|
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## Media
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| Product| Guidance |
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|----------|---------|
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Azure Media Services| [High Availability with Media Services and Video on Demand (VOD)](/azure/media-services/latest/architecture-high-availability-encoding-concept?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json)|
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## Management and governance
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| Product| Guidance |
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|Azure Monitor-Log Analytics |[Enhance data and service resilience in Azure Monitor Logs with availability zones](/azure/azure-monitor/logs/availability-zones) </p> [Log Analytics workspace replication](/azure/azure-monitor/logs/workspace-replication)|
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|Azure Site Recovery|[Set up disaster recovery for Azure VMs](../site-recovery/azure-to-azure-tutorial-enable-replication.md?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json)|
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## Migration
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| Product| Guidance |
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|Azure Private 5G Core|[Reliability in Azure Private 5G Core](../private-5g-core/reliability-private-5g-core.md?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json)|
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|Azure Web Application Firewall |[Deploy an Azure Firewall with Availability Zones using Azure PowerShell](../firewall/deploy-availability-zone-powershell.md?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json) </p> [How do I achieve a disaster recovery scenario across datacenters by using Application Gateway?](../application-gateway/application-gateway-faq.yml?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json#how-do-i-achieve-a-disaster-recovery-scenario-across-datacenters-by-using-application-gateway)|
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## Security
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| Product| Guidance |
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|Azure Key Vault|[Azure Key Vault availability and redundancy](/azure/key-vault/general/disaster-recovery-guidance?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json)|
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|Azure Web Application Firewall |[Deploy an Azure Firewall with Availability Zones using Azure PowerShell](../firewall/deploy-availability-zone-powershell.md?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json) </p> [How do I achieve a disaster recovery scenario across datacenters by using Application Gateway?](../application-gateway/application-gateway-faq.yml?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json#how-do-i-achieve-a-disaster-recovery-scenario-across-datacenters-by-using-application-gateway)|
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## Storage
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| Product| Guidance |
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|Azure Storage-Disk Storage|[Best practices for achieving high availability with Azure virtual machines and managed disks](/azure/virtual-machines/disks-high-availability?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json)|
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|Azure Storage Mover|[Reliability in Azure Storage Mover](reliability-azure-storage-mover.md)|
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## Web
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|Azure Notification Hubs|[Reliability in Azure Notification Hubs](reliability-notification-hubs.md)|
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|Azure SignalR Service|[Resiliency and disaster recovery in Azure SignalR Service](../azure-signalr/signalr-concept-disaster-recovery.md?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json)|
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## Related content
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-[Azure services with availability zones](availability-zones-service-support.md)
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-[Azure regions with availability zones](availability-zones-region-support.md)
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-[Build solutions for high availability using availability zones](/azure/architecture/high-availability/building-solutions-for-high-availability)
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