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You will need to have SQL Server and the latest version of the MDAC library installed before you can complete this exercise. Refer to the Introduction for setup instructions.

You can use the following questions to test your knowledge of information in Lesson 3, Designing Failover and Failback Strategies. The questions are also available on the companion CD if you prefer to review them in electronic form.

Answers to these questions and explanations of why each answer choice is right or wrong are located in the Answers section at the end of the book.

1. Return to the project that was created in Exercise 1. If you did not complete Exercise 1, you now need to complete steps 1 through 4 of Exercise 1 before continuing with this exercise. 2. Select Project, and Add Reference. 3. Select the COM tab, and scroll to the Microsoft ActiveX Data Objects 2.8 library component. Select that component, and click OK. This will allow you to use the ADO library in your code. 4. Return to the Form1 designer and drag a button control from the Toolbox onto the Form1 design surface. Use the following properties for this control: Name = btnOpenSNAC Text = Connect using SQL Native Client 5. Paste the following code below the Form1_load method. Modify connection strings to match your environment.

You can remedy index fragmentation by either reorganizing or rebuilding an index. You can address page split problems by specifying a fill factor and enabling the pad index option. You can improve query performance by creating a clustered index and one or more unclustered indexes on a table, and by creating an indexed view. If you use a nonclustered index and you know that your application will be performing the same query many times on the same table, you should consider creating a covering index on the table. You can improve the performance of queries that run against tables that contain BLOBs by creating XML indexes. Partitioning makes large tables or indexes more manageable because it lets you manage and access subsets of data quickly and efficiently while maintaining the integrity of a data collection.

9

//C# private void btnOpenSNC_Click(object sender, EventArgs e) { try { conn = new ADODB.Connection(); string connString = @"Provider=SQLNCLI;" + @"Data Source=(local);" + "Initial Catalog=Adventureworks;" + "Integrated Security=SSPI;" + "DataTypeCompatibility=80;"; conn.Open(connString,"" ,"", 0); MessageBox.Show("Connection was successful"); } catch (Exception ex) { MessageBox.Show(ex.Message); } }

1. Which of the following are characteristics of High Performance operating mode (Choose all that apply.) A. Asynchronous data transfer B. Synchronous data transfer C. Automatic failover D. Manual failover 2. Which of the following are characteristics of High Protection operating mode (Choose all that apply.) A. Asynchronous data transfer B. Synchronous data transfer C. Automatic failover D. Manual failover

To further practice and reinforce the skills you learned in this chapter, you can per form the following tasks:

You can use the following questions to test your knowledge of the information in Lesson 3, Maintaining and Optimizing Indexes. The questions are also available on the companion CD if you prefer to review them in electronic form.

'VB Private Sub btnOpenSNC_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOpenSNC.Click Try Dim conn As New ADODB.Connection conn.ConnectionString = "Provider=SQLNCLI;" _ & "Data Source=(local);" _ & "Initial Catalog=AdventureWorks;" _ & "Integrated Security=SSPI;" _ & "DataTypeCompatibility=80;" conn.Open() MessageBox.Show("Connection was successful") Catch ex As Exception MessageBox.Show(ex.Message) End Try End Sub

Review the chapter summary. Review the list of key terms introduced in this chapter. Complete the case scenario. This scenario sets up a real-world situation involv ing the topics of this chapter and asks you to create solutions. Complete the suggested practices. Take a practice test.

6. Open or return to Microsoft SQL Server Management Studio, and connect to the local instance of SQL Server. 7. Click New Query, and type the following SQL statement to query for open connections, or execute the same query from Exercise 1:

Summary

High Availability operating mode ensures that transactions are redundant across servers while also having the capability to automatically fail over. High Protection operating mode ensures that transactions are redundant across servers, but requires a manual failover. High Performance operating mode does not guarantee redundancy in transac tions and also requires manual failover.