How many secondary replicas are there in SQL Server 2016?

Question

Up to 8 secondary replicas, including 2 synchronous secondary replicas (SQL Server 2016) Up to 8 secondary replicas, including 2 synchronous secondary replicas (SQL Server 2017) Up to 8 secondary replicas, including 5 synchronous secondary replicas (SQL Server 2019) 11 февр. 2020 г.

How many replicas can I have in an AlwaysOn availability Group 2016?

Limit of two replicas (primary and secondary).

How many synchronous secondary replicas can I have in SQL Server 2019?

SQL Server 2019 (15. x) increases the maximum number of synchronous replicas to 5, up from 3 in SQL Server 2017 (14. x). You can configure this group of five replicas to have automatic failover within the group.

How many synchronous secondary replicas can I have?

To configure an availability group for automatic failover, you need to set both the current primary replica and at least one secondary replica to synchronous-commit mode with automatic failover. You can have up to three automatic failover replicas.

How many secondary replicas are supported by an AlwaysOn availability group?

Up to eight secondary replicas are supported, including one primary replica and two synchronous-commit secondary replicas.

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