The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 8: Backup and Restore for FILESTREAM DatabasesUSE NorthPolePartialGOSELECT *FROM Items/*Msg 670, Level 16, State 1, Line 2Large object (LOB) data for table "dbo.Items" resides on anoffline filegroup ("NorthPoleFS") that cannot be accessed.*/Listing 8-13:A SELECT * query on a FILESTREAM table will fail if the FILESTREAMfilegroup is not available.If only the relational data is selected, the query will be successful. If a partial restoresequence excludes any FILESTREAM filegroup, point-in-time restore is not supported.For more information see Piecemeal Restores (SQL Server) at http://brurl.com/fs24.Data and Backup Compression for FILESTREAMDatabasesOne of the primary concerns with regard to having a database storing large amounts ofBLOB data is the storage challenge, since FILESTREAM-enabled databases are expectedto store huge amounts of data.SQL Server 2008 introduced a data compression feature with compression of relationaldata at the page or row level. However, it does not compress the FILESTREAM dataassociated with the relational data.It is possible to mark a FILESTREAM data container as "compressed" at the Windowslevel, which ultimately compresses the FILESTREAM data stored in the folder. However,this option is beneficial only if the data in the FILESTREAM data container is furthercompressible. If the data is already compressed (such as a zip file, jpeg, etc.) enabling325