Snippet Name: Clusterless_AG_Synchronous_Availability

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Created Date: 2025-06-16 13:12:40
Last Modified Date: 2025-05-31 10:31:47

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Title: Clusterless AG Synchronous Availability
Author: user
in SQL Server Clusterless Always Availability Groups, can I have high availability synchronous mode?

Author: ChatGPT
Yes, in a **clusterless** Always On Availability Group (AG) in SQL Server, you can still configure high availability with **synchronous-commit mode**. However, there are important considerations:

1. **Synchronous-commit mode** ensures that transactions are committed on both the primary and secondary replicas before being acknowledged to the client. This provides high availability by guaranteeing that data is fully synchronized.

2. Without a **Windows Server Failover Cluster (WSFC)**, the availability group is not fully automatic in terms of failover. Failover must be manual because there's no cluster to monitor the health of replicas and trigger an automatic failover. 

3. You can still use synchronous replication for **data protection** and ensure that the data between the primary and secondary replicas is consistent. But, you won't get automatic high availability features such as **automatic failover**???you'd need to manually perform failover in case of an issue.

In summary, you can have high availability for data consistency in **synchronous-commit mode**, but the failover mechanism in a clusterless setup remains **manual**.