To specify stream sources for a load test

1. On the Tools menu, click Settings.
   
   
2. On the Sources tab, type the file name of the streaming media file that you want to test in New Stream.

   Any file that can be streamed by a Windows Media server can be used as a stream source for Windows Media Load Simulator, including Advanced Streaming Format files (.asf), Windows Media Audio files (.wma), WAV Audio files (.wav), and MPEG 1 Layer 3 audio files (.mp3). The source files you use for load-testing must be stored in the home publishing point (usually SystemDrive\ASFRoot) of the Windows Media server that you are testing.

3. Select the streaming protocol for the source file in Protocol List.

   The simulated client streams the file using the Microsoft Media Server protocol (MMS protocol) by default. You can also select the MMS protocol combined with the UDP data transport (MMSU) or the MMS protocol combined with the TCP data transport (MMST). If you select HTTP, the Windows Media server that you are load-testing must be configured to stream via HTTP.

   Note The Windows Media server will attempt protocol rollover if the simulated client uses the MMS protocol to request a stream. When the simulated client requests a stream using MMS, the Windows Media server attempts to stream the content via MMSU. If that protocol fails, the server first attempts to stream the content via MMST. If that fails, the server then attempts to use HTTP, if it has been enabled. 

4. Click Add.

   The stream (in the form protocol://server_name/stream) appears in the Selected Play List. The simulated client streams the content from the home publishing point on the Windows Media server.

Note Repeat steps 1 through 4 to add additional source files to the play list before proceeding to step 5.

5. Click Random or Sequential to assign streams in the list to simulated clients at random or sequentially.

   If you choose Random, any stream source in the Selected Play List is assigned to a simulated client when it requests a stream. If you choose Sequential, the next stream source in the Selected Play List that is available for assignment is assigned to a simulated client when it requests a stream. Sequential stream assignment occurs in the same order that the stream sources are listed in the Selected Play List.

Note To remove a stream from the Selected Play List, click the stream in the list, and then click Remove.