One of my friend sent an email with the requirement to load balance the traffic coming from application to secondary SQL Server replicas in always on availability group. Read-only routing refers to the ability of SQL Server to route qualifying read-only connection requests to an available Always On readable secondary replica. The advantage of Setting the readable secondary as Read-Intent Only will allow the secondary server to serve the read-only workload only if the connection string of the application contains Application Intent=Readonly parameter.
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Ganapathi varma Chekuri
Lead SQL DBA, MCP