Key Learnings from Early Customer Deployments for SQL Server 2012

Windows Cluster

Is the foundation for HA and DR in SQL Server 2012 AlwaysOn

AlwaysOn inherits all “characteristics” of Windows Cluster

Windows Cluster

every single AlwaysOn deployment is a Windows Cluster deployment

Windows Cluster

understand Windows Cluster for succesfully deploy, operate, monitor, troubleshoot, administer AlwaysOn

key areas are: quorum model, cluster network communication, DR procedures, cluster.exe, PowerShell

Windows Cluster

SQL Cluster (SQL Server Failover Cluster Instance)

therefore, is NOT necessarily a shared-storage cluster

Windows Cluster

many key enhancements have been made to Windows Cluster specifically for SQL Server 2012 AlwaysOn

Asymmetric Disk

Node Votes

Asymmetric Disk as Quorum resource

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