Updated: August 22, 2005
Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1
Scalability is the capability of a piece of hardware or software to easily expand to meet future computing needs. Each version of IIS is designed for better performance and scalability than the previous version. However, scalability can be impaired by hardware configurations and bottlenecks in poorly designed or poorly tested Web applications. Administrators can dramatically improve the scalability of their IIS server environment with careful planning and assessment of their infrastructure, which includes hardware, distributed applications, and custom components.
For information about scaling IIS, including information about adjusting IIS queue and cache settings and how to scale IIS with UNC centralized content storage, see Web Server Scalability.
For information about monitoring IIS performance and scalability, including which counters to use, the tools available, and how to collect useful performance data, see Optimizing IIS 6.0 Performance.