Chapter 4. Working with SQL-NS Instances

IN THIS CHAPTER

• What Is an Instance?

• Creating an Instance and Making It Run

• Examining the Parts of the Instance

• Deployment of SQL-NS Instances on Multiple Servers

• The Instance Configuration File in Detail

• Cleaning Up the Instance

This chapter examines SQL Notification Services instances: the fundamental units of isolation, deployment, and administration in SQL-NS. Every SQL-NS application you build will be part of some instance, so it's important to understand what an instance is and how it operates. This chapter covers the basic concepts behind instances and describes how to create one. Chapter 13, "Deploying a SQL-NS Instance," and Chapter 14, "Administering a SQL-NS Instance," describe instance operations, security, and deployment configuration.

Note

Before we begin, a word of warning: This chapter teaches a number of mechanical details and manual steps that might seem laborious. Don't be discouraged by this: Most of what you learn in this chapter you'll only do manually once. After you get through and understand this material, you'll likely automate all these steps and never have to think about them again. But, it's important to go through and understand them once so that you know what's going on behind the scenes. It's important to know what each step is doing and why it's necessary to do it; it's not important, however, that you memorize the exact syntax of each command or the precise sequence of steps.