| title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | f1_keywords | helpviewer_keywords | dev_langs | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
sys.dm_filestream_file_io_requests (Transact-SQL) |
sys.dm_filestream_file_io_requests (Transact-SQL) |
rwestMSFT |
randolphwest |
10/02/2023 |
sql |
system-objects |
reference |
|
|
|
[!INCLUDE SQL Server]
Displays a list of I/O requests processed by the Namespace Owner (NSO) at a 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. Not nullable. |
current_spid |
smallint | Shows the session ID (SPID) for the current SQL Server's connection. 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. 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. Not nullable. |
request_id |
int | Shows the unique request ID assigned by the driver to this request. Not nullable. |
irp_id |
int | Shows the unique IRP ID. This is useful for identifying all I/O requests related to the given IRP. Not nullable. |
handle_id |
int | Indicated the namespace handle ID. This is the NSO specific identifier and is unique across an instance. 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.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. Nullable. |
handle_context_address |
varbinary(8) | Shows the address of the internal NSO structure associated with the client's handle. 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. Nullable. |
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.