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Windows Server 2008 : Configuring Windows Media Services (part 13) - Configuring Caching Settings

12/25/2010 9:26:49 AM
Configuring Caching Settings

The Cache tab enables you to specify storage space locations and limits. (See Figure 35.) A proxy/cache server will attempt to store as much information as possible to reduce load on the origin server. The default settings do not include any limits on caching, but if you are caching data for a large amount of content, it is recommended that you set some limits.

Figure 35. Configuring cache settings for a Windows Media server


The Caching Speed section specifies how quickly data will be pulled from the origin server. If you select Maximum Available Bandwidth, the proxy/cache server will attempt to transfer content from the origin server as quickly as possible and will then cache it locally. The Content Bit Rate option specifies that data will be transferred from the origin server at the same rate as the bandwidth of the file. This option is useful if there are many caching servers that are accessing the same origin server.

The Prestuff tab provides options related to populating the proxy/cache server’s media cache, even when users are not requesting content. (See Figure 36.) It is useful when you want to populate server content initially before it goes into production (when the load will be significantly higher). The first option is to pull the information from a stream. This option requires the full URL to a publishing point that is located on the origin server. You can also limit the amount of bandwidth consumed for the prestuff operation.

Figure 36. Configuring Prestuff settings for a caching server


To reduce network load when transferring large amounts of data, you can also load the prestuff data from a file. The Content Path setting can be a local file system location or a network path. The Stream URL validates the files from an existing publishing point. To start the prestuff operation, click the Prestuff button.

More Info: Testing your Windows Media Services infrastructure

When you are planning to stream media to a large number of users, it helps to generate a sample load to test your Windows Media Services infrastructure. Microsoft has provided the Windows Media Load Simulator for Windows Media Services 9 Series as a free tool for generating load and simulating user activity. You can find this and other downloads on the Windows Media Services 9 Series Tools and Add-ins page at http://www.microsoft.com/windows/windowsmedia/forpros/serve/tools.aspx.


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