Configure the Byte-Range Request Segment Size in ARR

Updated: November 5, 2009

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

This topic describes how to configure the byte-range request segment size in Application Request Routing (ARR). Configuring the segment size determines how ARR supports byte-range requests in your environment. You should be familiar with the disk-based cache feature in ARR before you continue.

ARR segments byte-range requests into smaller pieces and then determines the corresponding range to send to the origin server. When ARR receives a response from the origin server, ARR stores the content in pieces and rewrites the response to match the original request. ARR then collects the smaller pieces and caches the entire content.

The administrator determines the allowable size of the smaller pieces into which ARR segments requests. Best practice is to set the allowable size based on the typical size of the byte-range requests in your environment. By default, the byte-range segment size is 256 KB.

  1. Open IIS Manager.

  2. In the Connections pane, expand the server node.

  3. In the Server pane, double-click Application Request Routing Cache.

  4. On the Application Request Routing Cache page, in the Actions pane, click Cache Configuration….

  5. On the Cache Configuration page, enter a new value in the Byte range segment size (KB) box.

  6. Click Apply.

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