> -----Original Message----- > From: [email protected] <[email protected]> > Sent: Friday, January 15, 2021 07:57 > To: Gentoo mailing list <[email protected]> > Subject: [gentoo-user] network transfer speed > > > On both of my systems the network card speed is showing 1000 > cat /sys/class/net/enp4s0/speed 1000 > > but when I do rsync larage file I only see about: 20 to 22MB/s On my home > network I get about 110MB/s between PC's > > Both PC's have SSD and the swith is Gigabit (I think). > How to find a the bottleneck?
If the PCs attached to the switch show 1000 then the switch _is_ gigabit. On my 1Gb home network I have an FTP transfer speed between Gentoo PCs A and B of almost 900Mbps, the other way round is almost half of that. One difference between the two systems is the disk, A uses SATA-2 disk while B has SATA-3. Does the 'B' in 110MB/s stand for byte? If so you have 880Mbps which is not bad, the problem probably lies somewhere else. Otherwise you could check the switch error count (if you have a managed switch) or the network card error count, just to ensure you don't have a cabling/connector problem. Have you tried other transfer methods just for comparison? I think FTP is still the fastest way to transfer files, though insecure or inconvenient as it might be. I have no experience with rsync. raffaele
