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> -----Original Message----- |
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> From: thelma@×××××××××××.com <thelma@×××××××××××.com> |
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> Sent: Friday, January 15, 2021 07:57 |
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> To: Gentoo mailing list <gentoo-user@l.g.o> |
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> Subject: [gentoo-user] network transfer speed |
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> On both of my systems the network card speed is showing 1000 |
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> cat /sys/class/net/enp4s0/speed 1000 |
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> but when I do rsync larage file I only see about: 20 to 22MB/s On my home |
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> network I get about 110MB/s between PC's |
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> Both PC's have SSD and the swith is Gigabit (I think). |
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> How to find a the bottleneck? |
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If the PCs attached to the switch show 1000 then the switch _is_ gigabit.
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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.
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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.
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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.
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raffaele |
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