On 1/15/21 1:11 AM, Raffaele BELARDI wrote: >> -----Original Message----- >> From: the...@sys-concept.com <the...@sys-concept.com> >> Sent: Friday, January 15, 2021 07:57 >> To: Gentoo mailing list <gentoo-user@lists.gentoo.org> >> 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
On a remote network I run ethtool on both cards and I got both 1000Mb/s speed 1.) ethtool net0 Settings for net0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Link partner advertised pause frame use: Symmetric Link partner advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: MII PHYAD: 0 Transceiver: internal Auto-negotiation: on MDI-X: on (auto) 2.) ethtool enp4s0 Settings for enp4s0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: Symmetric Advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on MDI-X: on (auto)