Application availability is the readiness of an application (and the service it runs under) to handle customer requests and to return timely and accurate responses. Ensuring consistently high application availability requires that you set availability goals that meet your business needs, configure your Web server to achieve those goals, and measure the compatibility and reliability of your applications. Internet Information Services (IIS) 6.0 running in worker process isolation mode provides the advanced features that you need to achieve and maintain a high degree of application availability.

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