The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 7: FILESTREAM Database AdministrationUSE NorthPoleGOCREATE PARTITION FUNCTION NPPartFN (INT) ASRANGE RIGHT FOR VALUES (4)CREATE PARTITION SCHEME NPPartDBSch ASPARTITION NPPartFN TO([PRIMARY],[NorthPole2])GOCREATE PARTITION SCHEME NPPartFSSch ASPARTITION NPPartFN TO(NorthPole_fs1, NorthPole_fs2)GOListing 7-29:Creating a partition function and scheme.First, this code creates a partition function, NPPartFN, which will split data across twofilegroups; relational data will be split across the primary and secondary data files, and theFILESTREAM data will be divided across the two FILESTREAM filegroups.We will associate this function with the ItemID column of the Items table, such thatrows with ItemID less than 4 will go to the first filegroup (PRIMARY for relational dataand NorthPole_fs1 for FILESTREAM data), and those with 4 and above will go to thesecond filegroup (NorthPole2 for relational data and NorthPole_fs2 for FILESTREAMdata). Of course, these numbers are very small and are used only for demonstrationpurposes. In the real world, you could use a larger value, or you might want to partitionbased on date, or some other value.The second part of the code creates two partition schemes; one for the relational data andthe other for the FILESTREAM data. Note that the partition switching of FILESTREAMdata works only when the RIGHT operator is used in the partition function. It does notwork with LEFT, which is a confirmed bug in the current versions of SQL Server.The next step is to create the Items table, exploiting our new partition scheme, as shownin Listing 7-30.301