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urlCompression Element [IIS Settings Schema]

IIS 7.0

NoteNote:

For more information about the urlCompression element, see the following topic on the Microsoft IIS.net Web site: URL Compression <urlCompression>.

Configures compression of static and dynamic content.

The following sections describe attributes, child elements, and parent elements for this section.

Attributes

Attribute

Description

doDynamicCompression

Optional Boolean attribute.

Specifies whether dynamic compression is enabled for URLs.

NoteNote:
Use of dynamic compression may increase processor utilization and reduce the overall performance of the Web server.

The default value is false.

doStaticCompression

Optional Boolean attribute.

Specifies whether static compression is enabled for URLs.

The default value is true.

dynamicCompressionBeforeCache

Optional Boolean attribute.

Specifies whether the currently available response is dynamically compressed before it is put into the output cache. For more information, see the Remarks section.

The default value is false.

Child Elements

None.

Parent Elements

Element

Description

configuration

Specifies the root element in every configuration file that is used by IIS 7.

system.webServer

Specifies the top-level section group (in ApplicationHost.config) in which this element is defined.

For more information about the urlCompression element, see the following topic on the Microsoft IIS.net Web site: URL Compression <urlCompression>.

When the dynamicCompressionBeforeCache attribute is true, IIS dynamically compresses the response the first time a request is made. The compressed response is put into the output cache, and the cached response is sent to the client. Subsequent requests are served from the compressed response in the output cache.

When dynamicCompressionBeforeCache is false, IIS puts the noncompressed response into the output cache. Then, every time that the response is requested, IIS dynamically compresses the cached response as it is sent to the client.

If you set the dynamicCompressionBeforeCache attribute to true, the CPU will dynamically compress the response only one time instead of every time that the page is requested. Because dynamic compression is CPU-intensive, a setting of true can reduce the server load and improve site throughput.

NoteNote:

If the dynamicCompressionBeforeCache attribute is true when the output cache response has been flushed, dynamic compression will not be performed before the response is put into the output cache. However, if the doDynamicCompression attribute is true, dynamic compression will still occur after the response has been put into the output cache.

Configuration locations

Machine.config

ApplicationHost.config

Root application Web.config

Application Web.config

Directory Web.config

Requirements

Microsoft Internet Information Services (IIS) version 7.0

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