Does Historian support a SQL Cluster

AVEVA Historian does not support SQL Server clusters and there are no plans to change that. Keep in mind that unlike traditional database applications, in AVEVA Historian the vast majority of functionality relies on time-series storage and extensions which SQL Server clusters do not address at all. Instead, most customers find deploying a pair of Historian "partners" on traditional non-clustered configurations simpler while also increasing the availability. 

AVEVA Historian does not support SQL Server clusters and there are no plans to change that. Keep in mind that unlike traditional database applications, in AVEVA Historian the vast majority of functionality relies on time-series storage and extensions which SQL Server clusters do not address at all. Instead, most customers find deploying a pair of Historian "partners" on traditional non-clustered configurations simpler while also increasing the availability.