| title | sys.dm_filestream_file_io_requests (Transact-SQL) | Microsoft Docs | ||||
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| ms.date | 03/03/2017 | ||||
| ms.prod | sql | ||||
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| ms.technology | system-objects | ||||
| ms.topic | language-reference | ||||
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| ms.assetid | d41e39a5-14d5-4f3d-a2e3-a822b454c1ed | ||||
| author | stevestein | ||||
| ms.author | sstein |
[!INCLUDEtsql-appliesto-ss2008-xxxx-xxxx-xxx-md]
Displays a list of I/O requests being processed by the Namespace Owner (NSO) at the given moment.
| Column | Type | Description |
|---|---|---|
| request_context_address | varbinary(8) | Shows the internal address of the NSO memory block that contains the I/O request from the driver. Is not nullable. |
| current_spid | smallint | Shows the system process id (SPID) for the current SQL Server's connection. Is not nullable. |
| request_type | nvarchar(60) | Shows the I/O request packet (IRP) type. The possible request types are REQ_PRE_CREATE, REQ_POST_CREATE, REQ_RESOLVE_VOLUME, REQ_GET_VOLUME_INFO, REQ_GET_LOGICAL_NAME, REQ_GET_PHYSICAL_NAME, REQ_PRE_CLEANUP, REQ_POST_CLEANUP, REQ_CLOSE, REQ_FSCTL, REQ_QUERY_INFO, REQ_SET_INFO, REQ_ENUM_DIRECTORY, REQ_QUERY_SECURITY, and REQ_SET_SECURITY. Is not nullable |
| request_state | nvarchar(60) | Shows the state of the I/O request in NSO. Possible values are REQ_STATE_RECEIVED, REQ_STATE_INITIALIZED, REQ_STATE_ENQUEUED, REQ_STATE_PROCESSING, REQ_STATE_FORMATTING_RESPONSE, REQ_STATE_SENDING_RESPONSE, REQ_STATE_COMPLETING, and REQ_STATE_COMPLETED. Is not nullable. |
| request_id | int | Shows the unique request ID assigned by the driver to this request. Is not nullable. |
| irp_id | int | Shows the unique IRP ID. This is useful for identifying all I/O requests related to the given IRP. Is not nullable. |
| handle_id | int | Indicated the namespace handle ID. This is the NSO specific identifier and is unique across an instance. Is not nullable. |
| client_thread_id | varbinary(8) | Shows the client application's thread ID that originates the request. ** Warning ** This is meaningful only if the client application is running on the same machine as SQL Server. When the client application is running remotely, the client_thread_id shows the thread ID of some system process that works on behalf of the remote client. Is nullable. |
| client_process_id | varbinary(8) | Shows the process ID of the client application if the client application runs on the same machine as SQL Server. For a remote client, this shows the system process ID that is working on behalf of the client application. Is nullable. |
| handle_context_address | varbinary(8) | Shows the address of the internal NSO structure associated with the client's handle. Is nullable. |
| filestream_transaction_id | varbinary(128) | Shows the ID of the transaction associated with the given handle and all the requests associated with this handle. It is the value returned by the get_filestream_transaction_context function. Is nullable. |
Requires VIEW SERVER STATE permission on the server.
Filestream and FileTable Dynamic Management Views (Transact-SQL)