The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 9: Investigating FILESTREAM DatabasesIdentifying the FILESTREAM file name associated with eachFILESTREAM valueSQL Server names FILESTREAM files based on the transaction LSN that created the file.SQL Server keeps track of this value internally and uses it to identify the correct file whena read/write request comes in.Though it is possible to identify the disk file associated with each FILESTREAM valueon your FILESTREAM column, it is a lengthy process. SQL Server MVP Paul Randal haswritten a detailed blog post which explains how to do this. I would recommend you take alook at it (http://brurl.com/fs9).FILESTREAM-related DMVsSQL Server has a number of FILESTREAM-related DMV views that we can use tofind very detailed information regarding FILESTREAM storage and activity againstFILESTREAM databases.sys.dm_filestream_file_io_handlesThis DMV returns all the open FILESTREAM handles which any client application hasopened using the Win32 API function OpenSqlFilestream or the SqlFilestreammanaged class. It has a number of columns providing detailed information about theopen I/O handles. You can find a complete reference of all the columns in MSDN athttp://brurl.com/fs10. The columns below may be particularly helpful.• filestream_transaction_id – Shows the ID of the transactionassociated with the given handle. This is the value returned by the346