> -----Original Message----- > From: bobwxc <bob...@88.com> > Sent: Friday, January 15, 2021 08:57 > To: gentoo-user@lists.gentoo.org > Subject: Re: [gentoo-user] network transfer speed > > 在 2021/1/15 下午2:56, the...@sys-concept.com 写道: > > 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? > 1000Mbps network card's maximum theoretical speed is about 125MiB/s. > It only works in short distances.
Correct but that's the line speed that you'll never reach, when you take into account Ethernet frame overhead, IP (and possibly TCP) header overhead and application ( rsync, FTP, SMB, NFS) overhead you get lower figures. In my experience 900Mbps (110MiBps) on a 1000Mbps line is more realistic for 'normal' transfers. raffaele
