Messages in this thread |  | | Date | Fri, 5 Jan 2001 14:00:21 -0500 | From | Tim Sailer <> | Subject | Re: Network Performance? |
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On Thu, Jan 04, 2001 at 01:33:40AM -0500, Tim Sailer wrote: > This may not be the right forum to ask this. If not, please let me know > where to ask. > > I have a Debian box with 2 NICs. Both 100/full duplex. This machine is > running as a ftp proxy (T.Rex suite). As part of the traffic going through the > box, some streams have 1000k window size for a certain reason. How do > I tune the NICs to handle the streams better? There are ways of doing this > on other OSs. Right now, the box only does about 1.8Mb when it should be doing > 80+Mb. > > Thanks, > Tim > > PS: This is really something to do with the window size and WAN latency. > The ultimate source and destination points are either Solaris or AIX > boxes. The files being sent are > 1GB in size. > The box does well when traffic goes in one NIC and out the other, as long > as the end point is local When it hits the WAN, it all dies. Traffic not > going through the box just flies right along, as long as both the end points > have the large tcp window size. Putting the Linux box in the middle is a > severe choke point. :(
I have followed the suggestions in http://www.psc.edu/networking/perf_tune.html but I still can not get any kind of real throughput. 250kB is all I can get from the Linux box. Setting [r|w]mem_[default|max] larger than 16k makes no difference, smaller slows things down even more. Has anyone else ran across this and fixed it? I can't be the only one with a Linux box on a fat pipe looking for maximum throughput...
Tim
-- Tim Sailer <sailer@bnl.gov> Cyber Security Operations Brookhaven National Laboratory (631) 344-3001 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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