Use this tab to enable Internet Information Services (IIS) 5.0 isolation mode and HTTP compression.
In IIS 6.0, the default process mode is worker process isolation. For backward compatibility, IIS 5.0 isolation mode is also available.
Run WWW service in IIS 5.0 isolation mode
Select to use IIS 5.0 isolation mode for applications that violate worker process isolation mode restrictions, such as the following:
Multi-instance ISAPIs: ISAPI applications that are written to be loaded by multiple processes and run concurrently.
Out-of-worker process: Applications that are written to farm out requests to other worker processes. This is not supported in worker process isolation mode.
Session state persisted in-process: Applications that persist session state in process. Session state may be lost upon worker process recycling. This is not an issue for ASP.NET applications, which always persist state off-process.
You can select the process to compress files before they are sent to compression-enabled clients. When a file is requested, the compressed copy is created and stored in a cache directory. This compressed file is sent when subsequent requests are received. Files are compressed only when they are requested.
Select to configure IIS to run your IIS applications in the same isolated process mode as IIS 5.0.
Compress application files
Select to configure IIS to compress application files before they are sent to a compression-enabled client to be cached.
Compress static files
Select to configure IIS to compress only static files before they are sent to a compression-enabled client to be cached.
Type or browse to the path of the directory in which you want to cache the compressed files. The directory must be on an NTFS file system partition on the local hard disk and should not be shared or marked for compression.
Click to locate the directory path.
Click to configure IIS to not restrict the size of the cache directory where the compressed files are located.
Click to configure IIS to limit the size of the cache directory where the compressed files are located.
Type the number of megabytes you want to limit the cache directory to in the adjacent box.
To learn more about IIS 5.0 isolation mode and HTTP compression, see the