TAILIEUCHUNG - Microsoft SQL Server 2008 R2 Unleashed- P159

Microsoft SQL Server 2008 R2 Unleashed- P159:SQL Server 2005 provided a number of significant new features and enhancements over what was available in SQL Server 2000. This is not too surprising considering there was a five-year gap between these major SQL Server 2008 is not as much of a quantum leap forward from SQL Server 2005 | 1524 CHAPTER 41 A Performance and Tuning Methodology earlier in the development process. In fact such changes are likely at least 10 or more times more expensive from both a monetary point of view and from a time point of view. As you can see in Figure each path begins with an assessment step. For new development this step covers the traditional initiation type of activities such as project sizing scheduling scope refinement and resourcing. As you identify project sizing scheduling and resourcing you should add in 5 to each subsequent phase of your traditional development life cycle for performance and tuning activities. We outline these activities shortly. In general they include capturing performance goals having performance and tuning design reviews building prototypes optimized to meet these performance goals and setting final checkpoints that demonstrate full compliance of performance achievement under full loads. Our performance and tuning methodology for new implementations focuses on six major steps along the way to deployments. We don t list all the tasks or activities around your programming or user interface activities. Instead we just focus on the SQL Server-oriented items that pertain to optimal performance and tuning. The six development methodology steps are Assessment Identify and Design Prototype Code and Test System Test and Acceptance Implementation Assessment During this project initiation phase a complete picture of the effort is usually identified and assessed at a high level. This includes Project sizing Determines if this is a small medium or larger project. Project scope clarifications Describe the intent and application scope to be created. Deliverables identified Identifies deliverables for all subsequent phases of the project. This should also include new tasks for performance and tuning activities. Schedules milestones Reflect what is needed to build this application when it must be delivered and everything along the way. Resources

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