AlwaysOn Failover Clustering Instance (FCI)
New in SQL Server 2012 is the AlwaysOn capability. Being “always on” is a pretty powerful statement and commitment. It is now possible to mostly achieve this commitment with infrastructure, instance, database, and client connectivity level HA. Built on Windows Server Failover Clustering (WSFC or FCS as it is also known), the SQL Server AlwaysOn configuration leverages the tried-and-true experience and technology components of SQL clustering and database mirroring under the covers (and repackaged). This new packaging and enhancement has allowed Microsoft to deprecate database mirroring in favor of these new AlwaysOn options (FCI and Availability Groups). AlwaysOn Failover Cluster Instances (FCI) is the ...
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