As doublechecking, I tried with another fast server inside the wan network of our academy, and I'm getting almost the same results (while absolute speeds are different from before, the gap is almost the same in magnitude).
I've read the page about tcptune, it's pretty clear now (values are almost the same I edited), still not having clear why on default OpenBSD the transfer rates are so low. thank you all Il 04/02/2010 21.36, Jean-Francois ha scritto: > Le jeudi 04 fivrier 2010 20:00:54, Sebastiano Pomata a icrit : >> If I may ask, I post to the list this question (I have no purpose on >> creating flames/trolls/os wars, just for my personal knowledge). >> >> On the same box (Core 2 Duo, Realtek Gigabit ethernet) I've performed >> today this simple test, downloading a big file from wu-wien FTP site >> (it's one of OpenBSD main mirrors). >> >> With a clean, partially configured default install of Linux Slackware >> (kernel 2.6.25) I reached download speeds of about 2.5 MB/s, while the >> same file from same server (not a round robin server for sure) >> downloaded on OpenBSD default 4.6 install hardly reached 400 KB/s. >> >> I repeated the test again two times, and got the same results. Then I >> fell over a page (https://calomel.org/network_performance.html) that >> offers some tweaking to OpenBSD's sysctl, and I dumbly pasted them in >> my sysctl.conf and rebooted. >> >> As (not) expected, download rate in OpenBSD reached almost exactly the >> same results of Linux Slackware. The main question is why? Do I need >> to tweak something more to get even better results? Are those settings >> safe enough to be used? Or the default settings had a strong reason >> for being there? >> Why on the FAQ (chapter 6) it says that tweaking >> net.inet.tcp.recvspace and >> net.inet.tcp.sendspace won't led to great improvements, while actually >> I got them? >> >> Again, my intentions are *really* positive and I just want to learn >> more (a quick search on -misc archives didn't led me to much stuff). >> >> Thank you >> Sebastiano >> > > In my opinion, the server limits the bandwith. I've had same issue. Reason why > you have 2.5 Mo is'nt clear, for me major openbsd ftp's are limited to approx > 400 Ko/sec per session. > Regards
