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On Friday, 15 January 2021 13:26:23 GMT Hogren wrote: |
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> On 15/01/2021 09:34, Raffaele BELARDI wrote: |
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> > ST Restricted |
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> > |
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> >> -----Original Message----- |
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> >> From: Hogren <hogren@×××××.com> |
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> >> Sent: Friday, January 15, 2021 08:50 |
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> >> To: gentoo-user@l.g.o |
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> >> Subject: Re: [gentoo-user] network transfer speed |
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> >> |
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> >> |
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> >> On 15/01/2021 07:56, thelma@×××××××××××.com wrote: |
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> >> Hello |
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> >> |
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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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> >>> |
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> >>> but when I do rsync larage file I only see about: 20 to 22MB/s On my |
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> >>> home network I get about 110MB/s between PC's |
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> >>> |
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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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> >> |
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> >> 20MB = 80Mb so it sounds like your network is a 100Mb network. What is |
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> >> the |
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> >> perfs of your switch(s) between your systems ? |
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> > |
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> > I disagree, /sys/class/net/enp4s0/speed shows the speed negotiated by the |
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> > network card with the switch, it cannot be 1000 if the switch is a only a |
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> > 10/100. I think we can safely assume the network is a gigabit one. |
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> > |
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> > raffaele |
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> |
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> Yes, I thought about that after. But may be he has several switchs |
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> between the two systems. |
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> |
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> Hogren |
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|
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There's an easy way to test the speed limits of the network Vs the limits of |
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the storage media. Use netcat/telnet to send a large file across from tmpfs |
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on host A to a tmpfs on host B. As long as tmpfs is large enough to not start |
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using swap, the speed will reflect what the network can achieve. |
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