On Friday, 15 January 2021 13:26:23 GMT Hogren wrote: > On 15/01/2021 09:34, Raffaele BELARDI wrote: > > ST Restricted > > > >> -----Original Message----- > >> From: Hogren <[email protected]> > >> Sent: Friday, January 15, 2021 08:50 > >> To: [email protected] > >> Subject: Re: [gentoo-user] network transfer speed > >> > >> > >> On 15/01/2021 07:56, [email protected] wrote: > >> Hello > >> > >>> 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? > >> > >> 20MB = 80Mb so it sounds like your network is a 100Mb network. What is > >> the > >> perfs of your switch(s) between your systems ? > > > > I disagree, /sys/class/net/enp4s0/speed shows the speed negotiated by the > > network card with the switch, it cannot be 1000 if the switch is a only a > > 10/100. I think we can safely assume the network is a gigabit one. > > > > raffaele > > Yes, I thought about that after. But may be he has several switchs > between the two systems. > > Hogren
There's an easy way to test the speed limits of the network Vs the limits of the storage media. Use netcat/telnet to send a large file across from tmpfs on host A to a tmpfs on host B. As long as tmpfs is large enough to not start using swap, the speed will reflect what the network can achieve.
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