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SQL Server Clustering and Failover Cluster Instance
Hi csk9178,
Could you be more precise abt. your question?
If you would like to know if Fail Cluster Instance (FCI) and Always On Availability Groups are the Same, then the Answer is no.
AVG are desasterrecovery mechanisms on DB-Level
FCI are on Instance lvl
You can combine both of them, with adding FCI on top of AVG. More Details are placed here: https://learn.microsoft.com/en-us/sql/database-engine/availability-groups/windows/failover-clustering-and-always-on-availability-groups-sql-server?view=sql-server-ver16
Cheers
Thanks for your response. I am aware of Always On Failover Cluster Instance (FCI) and Always On Availability Group (AG) are different concepts.
My doubt here is whether Clustering in SQL Server and Always On Failover Cluster Instance (FCI) are same or different.
Initially I thought the calling names are different but both concepts are same. But still some confusion is here.
Kindly clarify.
Hi csk9178
w/o being that deep into the full technical specification yes, they are the same thing. you are assuming correctly.
As part of the SQL Server Always On offering, Always On Failover Cluster Instances leverages Windows Server Failover Clustering (WSFC) functionality to provide local high availability through redundancy at the server-instance level-a failover cluster instance (FCI).
https://learn.microsoft.com/en-us/sql/sql-server/failover-clusters/windows/always-on-failover-cluster-instances-sql-server?view=sql-server-ver16