Use Case

DxEnterprise Extended Vhosts for Stacked-Clustering: Optimized HA/DR for Complete Business Resilience

Traditional SQL Server High Availability

In a typical SQL Server HA/DR environment running on Windows, users generally turn to WSFC, a traditional clustering solution for Windows that is restrictive and can become extremely costly and difficult to manage as the number of servers and licenses add up. In a Linux-based environment, IT teams are forced to rely on combining other data replication solutions with highly available SQL Server instances and VPNs for DR. They are often forced to implement a complex Pacemaker-based solution that requires separate clusters for HA instances and AGs, while also relying on VPNs for DR. In either scenario, costs quickly add up due to the high number of servers and licenses needed, along with the additional fees and hardware costs necessary to maintain VPNs. Not only that, but these alternative solutions are very complex to implement and maintain, lead to VPN security exposures, are difficult to scale, and fail to meet organizations’ RTO and RPO requirements.

Extended Vhosts help unify SQL Server local HA and DR with Availability Groups

Create a Unified HA/DR Environment

Traditional SQL Server HA/DR Environment

Traditional deployment of multiple SQL Server Availability Groups

DxEnterprise Extended Vhosts HA/DR Environment

DxEnterprise Extended Vhost deployment of multiple SQL Server Availability Groups

DxEnterprise enables organizations to optimize their SQL Server environment to create a unified high availability and disaster recovery environment for complete business resilience. With DxEnterprise, local HA can be combined with SQL Server Availability Groups for remote data protection using Extended Vhosts (exVhosts) to reduce database system downtime and achieve true business continuity – And it can do so without the use of VPNs or other networking technologies. ExVhosts are specifically designed for running an AG across multiple highly available instances. This gives users the ability to have HA on both the primary and secondary replicas for the AG while providing independent health monitoring and failovers of the HA instances and the AG. This advanced technology supports both Windows and Linux and includes support for AGs across mixed OS platforms.

Benefits of Extended Vhosts


Leverage SQL Server local HA and built-in AG replication to avoid 3rd party expense


Eliminate sprawl by letting HA instances and AGs all reside in one single DxE cluster

security icon

Replace the need for VPNs and associated costs with app-level ZTNA tunnels

Native. Containerized. Anywhere in Between.

DH2i gets you closer to zero downtime.