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Today s off-the-shelf database servers from one of the major system vendors are both powerful and flexible enough for most SQL Server implementations. However, a sound understanding of server design and configuration principles remains an important skill. The SQLIO and SQLIOSIM tools should be used to validate both the capacity and validity of a storage system before SQL Server is installed. Consider these tools an essential component in the commissioning process of a new production system. Track-align SQL Server partitions before formatting with a 64K allocation size using the NTFS file system. Use a switched gigabit network for maximum network performance, and ensure NIC speed and duplex settings are manually configured. Consider NIC teaming for performance and redundancy, particularly for connections to an iSCSI SAN, but be aware of the implications for use in a cluster (discussed in chapter 5). Component redundancy is a crucial aspect of a reliable database server. Build fault tolerance into as many server components as possible, including power supplies and fans, and protect servers from power failures with a UPS. To minimize costs and maximize performance, purchase servers and components within the framework of a server replacement policy. Taking into account falling prices and rapidly increasing component performance, servers should be purchased for a two- to three-year production lifecycle. Minimize support costs and fault correction time by developing standard database server builds, including standardizing hardware, software, bios and firmware versions, and so forth.

Before consolidating or virtualizing SQL Servers on one host machine, consider the load profiles of each, best obtained through a baseline analysis process. Locating complementary instances together is of crucial importance in avoiding performance problems. In addition to the load profiles, give consideration to maintenance windows, disk usage, and tempdb usage when consolidating servers. Before virtualizing or consolidating SQL Server instances, understand the licensing impacts of both methods. To enable thorough performance analysis and tuning of a virtualized SQL Server, consider the need to access and learn the virtualization toolset. Such tools are required in order to understand the impact one virtual machine may be having on another. When virtualizing SQL Server instances, all of the other best practices we ll cover throughout this book hold true, such as using separate disks for data and logs, scheduling regular backups, preallocating space to avoid autogrowth operations, and so forth. Virtualization isn t an invitation to ignore the importance of these fundamental tasks. Most importantly, before virtualizing a critical SQL Server environment, ensure the support implications of doing so are well understood. Additional information on the best practices covered in this chapter can be found online at http://www.sqlCrunch.com/server. The last three chapters have been focused on planning and design. In the next chapter, we ll roll up our sleeves and install a SQL Server 2008 instance.

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tools. Here are the major ones discussed in this book: SQL Server Management Studio (SSMS) The main GUI-based management tool used for conducting a broad range of tasks, such as executing T-SQL scripts,

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backing up and restoring databases, and checking logs. We ll use this tool extensively throughout the book. SQL Server Configuration Manager Enables the configuration of network protocols, service accounts and startup status, and various other SQL Server components, including FileStream. We ll cover this tool in chapter 6 when we look at configuring TCP/IP for secure networking. SQL Server Profiler Used for a variety of performance and troubleshooting tasks, such as detecting blocked/deadlocked processes and generating scripts for creating a server-side SQL trace. We ll cover this tool in detail in chapter 14. Database Engine Tuning Advisor Covered in chapter 13, this tool can be used to analyze a captured workload file and recommend various tuning changes such as the addition of one or more indexes. One very important tool we haven t mentioned yet is SQL Server Books Online (BOL), shown in figure 1.2. BOL is the definitive reference for all aspects of SQL Server and includes detailed coverage of all SQL Server features, a full command syntax, tutorials, and a host of other essential resources. Regardless of skill level, BOL is an essential companion for all SQL Server professionals and is referenced many times throughout this book. Before we launch into the rest of the book, let s pause for a moment to consider the breadth and depth of the SQL Server product offering. With features spanning traditional online transaction processing (OLTP), online analytical processing (OLAP), data mining, and reporting, there are a wide variety of IT professionals who specialize in SQL Server. This book targets the DBA, but even that role has a loose definition depending on who you talk to.

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