applying this you can reduce cluster performance.

GO

/****** Object: Index [IX_Stu] Script Date: 12/28/2009 11:11:43 ******/

CREATE CLUSTERED INDEX [IX_Stu] ON [dbo].[stu]

(

[StuKey] ASC

)WITH (PAD_INDEX = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, IGNORE_DUP_KEY = OFF, ONLINE = OFF) ON [PRIMARY]

table (some columns omitted for brevity):

CREATE TABLE [dbo].[stu](

[StuCertKey] [int] IDENTITY(1,1) NOT NULL,

[StuKey] [int] NULL

CONSTRAINT [PK_Stu] PRIMARY KEY NONCLUSTERED

(

[StuCertKey] ASC

)WITH (PAD_INDEX = OFF, IGNORE_DUP_KEY = OFF, FILLFACTOR = 80) ON [PRIMARY]

) ON [PRIMARY]