Microsoft KB Archive/898944

= How to modify the server configuration file to avoid I/O limitations during fast-forward/rewind operations in Windows Media Services 9 Series =

Article ID: 898944

Article Last Modified on 5/2/2005

-

APPLIES TO


 * Microsoft Windows Media Services 9 Series
 * Microsoft Windows Server 2003 Service Pack 1

-





Microsoft Windows Media Services 9 Series lets a client fast-forward or rewind at a rate that is faster than real time. However, because of the amount of data that is being streamed during a fast-forward/rewind operation, the server may experience some disk I/O limitations. This article discusses how to modify the server configuration file to limit the maximum fast-forward/rewind rates.



RESOLUTION
Warning This article contains information about editing the namespace. Before you edit the namespace, verify that you have a backup copy that you can restore if a problem occurs. If you edit the namespace incorrectly, you can cause serious problems that may require you to reinstall any product that uses the namespace. Microsoft cannot guarantee that problems that result if you incorrectly edit the namespace can be solved. Edit the namespace at your own risk.

To change the maximum fast-forward/rewind rate, follow these steps:  Stop Windows Media Services by running the following command at a command prompt:

net stop wmserver

 Change to the following folder where the namespace file is located:

%SystemRoot%\system32\windows media\server

 In Notepad, open the ServerNamespace.xml file. Locate the Other node in the namespace.  Add the following text under the Other node:  The value that is specified in the MaxPlayRate node limits the maximum fast-forward or rewind rate that the server will use. In this example, this value limits the server to a rate that is five times the typical rate of play.  Save and then close the ServerNamespace.xml file.</li> Start Windows Media Services by running the following command at a command prompt:

net start wmserver

</li></ol>

The following code describes the changes that were made to the ServerNamespace.xml file: <node name=&quot;Other&quot; opcode=&quot;create&quot;> <node name=&quot;MaxPlayRate&quot; opcode=&quot;create&quot; type=&quot;int32&quot; value=&quot;0x5&quot; /> ...

<div class="moreinformation_section">

MORE INFORMATION
By default, the server uses a maximum fast-forward/rewind rate of 10 if the MaxPlayRate node does not exist. This value means the rate will be 10 times the rate of play. This default value corresponds with the default maximum fast-forward/rewind value in most versions of Microsoft Windows Media Player.

Note This change does not affect rates that are specified in Advanced FF/RW or &quot;trick mode&quot; requests. For more information about Advanced FF/RW requests, see Windows Media Services Help.

Additional query words: File I/O WMS Namespace limit

Keywords: kbinfo KB898944

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.