Each availability replica of a given availability group must reside on a different node of the same WSFC cluster. SQL Server 2016 AlwaysOn Availability Groupsĭeploying AlwaysOn Availability Groups requires a Windows Server Failover Clustering (WSFC) cluster. Since there is extra overhead with synchronous disk synchronisation when using Storage Spaces Direct (S2D) and extra time during failovers, it is less highly available compared to SQL Failover Cluster Instance. As a result, the SQL Server 2016 (or later) AlwaysOn feature is supported for BizTalk databases on-premises or in Azure IaaS scenarios. Starting with SQL Server 2016, SQL Server AlwaysOn Availability Groups supports MSDTC for on-premises and using Azure VMs. SQL Failover Cluster Instance using Azure Shared Disks is the most highly available solution. Since Azure Shared Disk is now available, it is possible to cluster both SQL and MSDTC in Azure VMs. As a result, BizTalk did not have a HA solution when using Azure VMs. In Azure IaaS (Azure virtual machines), previously, BizTalk (Windows and SQL) did not support Failover Cluster Instances as there was no supported shared disks, which is required for clustering of SQL and MSDTC. The database computer captures this work, and persists it to disk.īizTalk uses SQL Server Failover Clustering and Log Shipping to provide high availability, backup and restore, and disaster recovery for its databases. Other components and hosts in BizTalk Server have specific roles when integrating disparate business applications, such as receiving, processing, or routing messages. Background and historyīizTalk Server relies heavily on SQL Server for data persistence. See Backing Up and Restoring BizTalk Server Databases for specific details.Īvailability Modes details the commit options with Always On Availability Groups. For disaster recovery, it's recommended to configure the Backup BizTalk Server job, and use log shipping. BizTalk Server supports synchronous-commit mode asynchronous-commit mode isn't supported.If you're using a previous SQL Server version, this article doesn't apply to you. BizTalk Server support Always On Availability Groups starting with SQL Server 2016 and newer.
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