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If the leaf-level index page does not have room for the new value, SQL Server has to perform an operation called a page split During this operation, an empty page is allocated to the index, and one-half of the values on the page that was filled are moved to the new page If this also causes an intermediatelevel index page to overflow, a page split occurs at that level as well If the new row also causes the root page to overflow, the root page is split into a new intermediate level, causing a new root page to be created Indexes can improve query performance, but each index created also causes perfor mance degradation on all data manipulation Therefore, you need to carefully bal ance the number of indexes for optimal operations.

4

Additionally, separate OUs enable you to create different baseline configurations, using different Group Policy objects (GPOs) linked to the client and the server OUs. Group Policy, discussed in detail in 6, Group Policy Infrastructure, enables you to specify configuration for collections of computers by linking GPOs that contain configuration instructions to OUs. It is common for organizations to separate clients into desktop and laptop OUs. GPOs specifying desktop or laptop configuration can then be linked to appropriate OUs. If your organization has decentralized, site-based administration and wants to manage unique configurations for desktops and laptops, you face a design dilemma. Should you divide your clients OU based on administration and then subdivide desktops and laptops, or should you divide your clients OU into desktop and laptop OUs and then subdivide based on administration The options are illustrated in Figure 5-2. Because the primary design driver for Active Directory OUs is the efficient delegation of administration through the inheritance of access control lists (ACLs) on OUs, the design on the left would be recommended.

9

Specifying this parameter causes SQL Server Agent to fire an alert when a certain error occurs. You need to specify a valid error number and event.

As a general rule of thumb, if you have five or more indexes on a table designed for online transaction processing (OLTP) operations, you probably need to reevaluate why those indexes exist Tables designed for read operations or data warehouse types of queries usually have many more indexes because little consideration needs to be taken for the impact of write operations..

Parent and child trusts Tree-root trusts External trusts Shortcut trusts Realm trusts Forest trusts

Figure 5-4

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Description The UTC date-time of the protocol event. The distinguished name (DN) of the connector that is associated with the SMTP event. A GUID that is unique for each SMTP session but is the same for each event that is associated with that SMTP session. A counter that starts at 0 and is incremented for each event in the same SMTP session. The local endpoint of an SMTP session. This consists of an IP address and TCP/IP port number and is formatted as <IP address>:<port>. The remote endpoint of an SMTP session. This consists of an IP address and TCP/IP port number and is formatted as <IP address>:<port>. A single character that represents the protocol event. The possible values for event are + (Connect), (Disconnect), > (Send), < (Receive), and * (Information). Text information that is associated with the SMTP event. Additional contextual information that might be associated with the SMTP event.

NOT NULL,

At this point, you should watch the multimedia presentation Creating a Performance Baseline included in the Multimedia folder on the CD accompanying this book.

Calculating Effective NTFS Permissions. . . . . . . . . . . . . . . . . . . . . . . . . . 5-29

At run time, you can create new TreeNode objects and add them as root nodes to the TreeView control or add them as child nodes to another TreeNode. For both of these procedures, you use the Nodes.Add method, as shown here:

Partition Processing Raw File Destination Recordset Destination SQL Server Compact Destination SQL Server Destination

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