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Always On AG Specialists

SQL Server High Availability

Design and implement mission-critical SQL Server HA using Always On Availability Groups, Windows Server Failover Clustering, and geo-redundant Distributed AGs. Achieve 99.99% uptime with zero data loss failover.

99.99%
Uptime Achieved
< 30s
Auto Failover RTO
RPO = 0
Synchronous Commit
9 Replicas
SQL Server 2019+

SQL Server HA Solutions We Implement

We select and implement the right HA solution for your RTO, RPO, budget, and infrastructure requirements.

Recommended
Always On Availability Groups
Synchronous and asynchronous replicas with automatic failover, readable secondaries, and AG listener for transparent connection routing.
  • Up to 9 replicas (SQL 2019+)
  • Automatic failover
  • Readable secondaries
  • AG listener setup
Enterprise
Windows Server Failover Cluster
Instance-level HA using WSFC with shared or replicated storage. Protects the entire SQL Server instance and all databases.
  • Instance-level protection
  • Shared storage or Storage Spaces Direct
  • 2 or more nodes
  • Transparent failover
DR
Log Shipping
Asynchronous DR solution using automated log backup and restore. Low cost, easy to implement, works across SQL Server versions.
  • Cross-version support
  • DR for older editions
  • Configurable latency
  • Manual failover
Multi-Site
Distributed Availability Groups
Connect two separate AGs across different data centers for global DR without shared cluster infrastructure.
  • Cross-datacenter DR
  • No shared WSFC
  • Geo-redundancy
  • Independent clusters

How We Deploy Your HA Solution

01

HA Assessment

Review current architecture, RTO/RPO requirements, network topology, storage, and licensing to select the right HA solution.

02

Architecture Design

Design the AG topology — replica placement, synchronous vs asynchronous, listener configuration, and subnet routing.

03

WSFC Setup

Configure Windows Server Failover Cluster — nodes, quorum, network adapters, and cluster validation.

04

AG Deployment

Create and configure the Availability Group — endpoints, replicas, listener, and database join.

05

Failover Testing

Perform planned failovers, validate application reconnection via listener, and document RTO/RPO achieved.

06

Monitoring Setup

Configure AG health dashboard, alerts for replica sync state, failover events, and secondary latency.

HA Design Checklist

Every SQL Server HA deployment we deliver covers these critical areas.

WSFC quorum configuration and witness setup
AG endpoint encryption and port configuration
Listener with multi-subnet failover support
Synchronous vs asynchronous replica selection
Readable secondary configuration for read scale-out
Backup preferences on secondary replicas
Automatic failover conditions and health checks
Distributed Transaction support (MSDTC)
SQL Server Agent job synchronization across replicas
Logins, SQL Agent jobs, and linked servers on secondaries
Database Mail and operator alerts for AG state changes
Application connection string configuration (MultiSubnetFailover=True)

SQL Server HA FAQs

Eliminate Single Points of Failure in Your SQL Server

Get a free HA readiness assessment — we'll review your current setup and recommend the optimal HA architecture for your RTO, RPO, and budget.