site_archiver@lists.apple.com Delivered-To: Macnetworkprog@lists.apple.com On 9/30/05, Chris McFarling wrote:

Is there a way to force AFP to use a specific window size? Long story short...when two Gb OS X clients send simultaneously to our XServe (via AFP), the transfer rate for each drops to about 6MB/s. (when either machine is sending by itself, the transfer rate is ~ 30-40MB/s). I've duplicated this behavior with iperf as well. Using iperf, I've found that by decreasing the window size, the performance is dramatically improved.

I would love to be able to make AFP use a smaller window size as well, at least to test and see if it makes a difference.

Simultaneous upload and download performance is a classic problem with TCP/IP. <http://homepage.ntlworld.com/robin.d.h.walker/cmtips/downup.html> You might want to consider using a rate limiter like IPNetSentryX: <http://sustworks.com/site/app_note_1006.html> It adjusts the TCP window size on the fly to improve traffic flow (especially when large buffers are involved). You might also use IPNetTunerX to experiment with various settings on the fly, and IPNetMonitorX see the corresponding effect. Kind Regards, - Peter Sichel Sustainable Softworks _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists.... This email sent to site_archiver@lists.apple.com