My understanding is that if one wants to implement Always On / Availability Groups (without FCI) the Windows Clustering Service would need to be installed, i.e. a Windows Cluster is required but not a SQL Cluster. Is that correct?
Sql-server – What clustering features are required to implement Availability Groups
availability-groupssql server
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Best Answer
MSDN has an excellent article about this exact topic.
Some salient points:
SQL Server Clustering can be used, but is not required.
From this MSDN page, we get: