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Bit Rate Throttling Page

Updated: June 10, 2010

Applies To: Windows 7, Windows Server 2008, Windows Server 2008 R2, Windows Vista

Use the Bit Rate Throttling feature page to throttle the rate at which the Web server delivers files to clients. You can sort the list by clicking one of the feature page column headings or select a value from the Group by drop-down list to group similar items.

The following tables describe the UI elements that are available on the feature page and in the Actions pane.

 

Element Name Description

File Type

Displays the file name extension for the file type.

Fast Start

Displays the amount of content (either the duration or size) that is sent to the client buffer before throttling starts. Fast Start reduces start-up latency in the client by prerolling (buffering data) content to the client as fast as the connection will allow, up to the specified amount.

For media files, the amount of preroll content sent to the client is specified by its duration in seconds of elapsed time or by its size in kilobytes (depending on the Throttle Type).

For data files, the amount of preroll content sent to the client is specified by its size.

Throttle Rate

Displays the rate at which files are delivered to clients after Fast Start finishes. For media files, the value is expressed as either a percentage of the encoded bit rate of the file or, if delivered as a data file, in kilobits per second (Kbps).

Throttle Type

Displays how throttling is applied to the files that are delivered to clients.

  • Media - the files are delivered to clients at a rate equal to a percentage of the encoded bit rate (for media files only).

  • Data - the files are delivered to clients at a constant bit rate (for media files or data files).

Entry Type

Displays whether the item is Local or Inherited. Local items are read from the current configuration file, and Inherited items are read from a parent configuration file.

noteNote
Bit Rate Throttling may not be able to detect the encoded bit rate of some media files if the encoded file header is not formatted correctly, or it is missing or corrupted. These files will be downloaded to clients and no throttling will be applied. You can specify a default throttle rate for these files in the Advanced Settings dialog box.

 

Element Name Description

Enable

Enables the Bit Rate Throttling feature.

Disable

Disables the Bit Rate Throttling feature.

Add Throttle Setting

Opens the Add Throttle Setting dialog box in which you can add a file type and specify throttle settings for it.

Edit

Opens the Edit Throttle Setting dialog box in which you can edit throttle settings for the selected file type.

Remove

Removes the item that is selected from the list on the Bit Rate Throttling feature page.

Advanced Settings

Opens the Advanced Settings dialog box in which you can specify global throttle rate settings for all file types displayed in the feature list. This action is not available at the server level.

Revert To Inherited

Reverts the feature to inherit settings from a parent configuration file. This deletes local configuration settings for this feature. This action is not available at the server level.

See Also

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