| title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | f1_keywords | helpviewer_keywords | dev_langs | ||||||||
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sys.dm_hadr_instance_node_map (Transact-SQL) |
Returns the name of the Windows Server Failover Cluster node that hosts the server instance. |
rwestMSFT |
randolphwest |
10/17/2023 |
sql |
system-objects |
reference |
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[!INCLUDE SQL Server]
For every instance of [!INCLUDE ssNoVersion] that hosts an availability replica that is joined to its Always On availability group, returns the name of the Windows Server Failover Cluster (WSFC) node that hosts the server instance. This dynamic management view has the following uses:
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This dynamic management view is useful for detecting an availability group with multiple availability replicas that are hosted on the same WSFC node, which is an unsupported configuration that could occur after an failover cluster instance (FCI) failover if the availability group is incorrectly configured. For more information, see Failover Clustering and Always On Availability Groups (SQL Server).
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When multiple SQL Server instances are hosted on the same WSFC node, the Resource DLL uses this dynamic management view to determine the instance of [!INCLUDE ssNoVersion] to connect to.
| Column name | Data type | Description |
|---|---|---|
ag_resource_id |
nvarchar(256) | Unique ID of the availability group as a resource in the WSFC. |
instance_name |
nvarchar(256) | Name-<server>/<instance>-of a server instance that hosts a replica for the availability group. |
node_name |
nvarchar(256) | Name of the WSFC node. |
[!INCLUDE dmv-cluster-column-display]
For [!INCLUDE sssql19-md] and previous versions, requires VIEW SERVER STATE permission on the server.
For [!INCLUDE sssql22-md] and later versions, requires VIEW SERVER PERFORMANCE STATE permission on the server.