Benefits of Moving to Worker Process Isolation Mode

Applies To: Windows Server 2003, Windows Server 2003 with SP1

Worker process isolation mode provides higher levels of security and availability for Web sites and applications than IIS 5.0 isolation mode. Therefore, it is recommended that you configure IIS 6.0 to run in worker process isolation mode.

In IIS 5.0, applications can be pooled together out-of-process, but in only one application pool. In IIS 6.0, worker process isolation mode supports multiple application pools, where each application pool can have a different configuration, such as a unique recycling configuration. Therefore, you can prevent a single Web site or application that periodically fails from disrupting other Web sites and applications.

In addition, worker process isolation mode provides the following improvements to IIS:

• Security Enhancements

• Performance and Scaling Enhancements

• Availability Enhancements