IIS Compression 1.0

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Overview
Installation Notes
- Troubleshooting Installation Issues
- For More Information

Overview

IIS Compression is a bundle of two IIS compression scheme providers iisbrotli.dll and iiszlib.dll that enable IIS to compress HTTP response contents.

iisbrotli.dll supports Brotli compression.
iiszlib.dll supports both Gzip and Deflate compression.

IIS Compression is an open-source project, and the source code is available on Github: Microsoft/IIS.Compression

Installation Notes

You will need to run the installation package as an administrator. This can be accomplished by one of the following methods:

Logging in to your server using the actual account named "Administrator".
Logging on using an account with administrator privileges and opening a command-prompt by right-clicking the Command Prompt menu item that is located in the Accessories menu for Windows programs and selecting "Run as administrator", then typing the appropriate command listed below for your version of Windows to run the installation:
msiexec /I <msi_filename>

The installer registers iisbrotli.dll as the br (Brotli) compression scheme provider in applicationHost.config. It also replaces the default gzip compression scheme provider gzip.dll with iiszlib.dll.

Troubleshooting Installation Issues

If you encounter any problem during installation, you can run appropriate command listed below for your version of Windows to create a log file that will contain information about the installation process:

msiexec /L iiscompression_install.log /I <msi_filename>

You can analyze this log file after a failed installation to help determine the cause of the failure.

For More Information