ACNS Windows Media Performance

[Joshua Warcop]

Current Hardware: CDM-4630 and CE-560 running ACNS 5.1.9.5, all servers and ACNS hardware on local LAN.

I have a single channel setup and a crawler manifest to fetch about 2gig of Windows Media ASF files. The crawler is using HTTP and I'm not allowing redirects to the origin server. The content is prepositioning fine and there are no errors during this process.

There is a large performance difference between the stream on the current Windows Media Server vs. the CE-560 copy. The stream from the Windows Media Server buffers almost instantly and I can skip around in the media file just fine without waiting for the player to buffer. This is exactly the opposite when I attempt to play the file from the CE-560. It takes a good 5 to 10 seconds to buffer and it has to buffer again to skip through the media file.

I'd like to know where to look to see if there is a problem -- if there is a problem or is this just a poor performance issue?

Thanks ahead of time for any insight,

Josh Warcop

[didyap]

Guess the CE is treating this as a normal http request and hence the buffer time is long.

[blackwellj]

I am seeing the same issue with a CE-507 and NM-CE. I can preposition Windows service packs (129MB .exe files) on the CEs without any issue. Without WCCP redirection, the desktop can copy (via http) the service pack at 6+MB/s. With WCCP redirection enabled, the download performance drops to <200KB/s. All ports are 100Mb full duplex with no errors. The router is a 2621XM with cef and ip route-cache same-interface. I have attempted to adjust the TCP window sizing and bandwidth configuration on the CE with no improvement.

I have a TAC case open and will keep you posted on what I find out.

MB

[blackwellj]

The bitrate command will provide greater throughtput.

I used the syntax: bitrate http default 4000

and immediately increased from 200KB/s throughtput to 800+KB/s throughput on a 10Mb HD laptop.