Unified High Availability & Disaster Recovery for SQL Server Using DxEnterprise Extended Vhosts
Why Traditional SQL Server HA/DR Falls Short
Windows-Based Environments
Traditional Windows Server Failover Clustering (WSFC):
- Requires complex configuration and management
- Scales poorly as infrastructure grows
- Increases licensing and infrastructure costs
Linux-Based Environments
Typical Linux HA/DR setups like Pacemaker rely on:
- Expensive 3rd party replication solutions
- Separate clusters for HA and Availability Groups
- VPNs for disaster recovery connectivity
These approaches typically result in:
❌ High infrastructure and licensing costs
❌ Complex deployments and ongoing maintenance
❌ VPN-related security exposure
❌ Difficulty meeting RTO/RPO requirements
❌ Single-platform limitations
Create a Unified SQL Server HA/DR Environment
Traditional SQL Server HA/DR Environment
DxEnterprise Extended Vhosts HA/DR Environment
What is a DxEnterprise Extended vHost (exVhost)
DxEnterprise exVhosts allow organizations to create a unified HA/DR architecture by combining:
- SQL Server local high availability
- Availability Groups built-in replication for remote data protection
Ultimately, exVhosts allow users to run an AG across multiple highly available instances, giving users:
- The ability to have HA on both the primary and secondary replicas for the AG
- Independent health monitoring and failovers of the HA instances and the AG
- Mixed-platform support for AGs across Windows and Linux
Benefits of Extended Vhosts
Leverage local SQL Server high availability and built-in AG functionality to eliminate 3rd party replication expense
Simplify management by letting HA instances and SQL Server Availability Groups all reside in one single DxE cluster
Replace VPNs and their associated maintenance & hardware costs with app-level zero trust network access (ZTNA) tunnels
Enable SQL Server failover across geographically dispersed environments without complex networking dependencies