On Friday 07 February 2020 02:17:59 Andrei POPESCU wrote: > On Vi, 07 feb 20, 02:04:17, Gene Heskett wrote: > > Greetings all; > > > > My local network has 2 8 port switches, one here in this room that > > claims to be a gigabit and managed. > > > > One of its ports is connected to the upstream port of another dumber > > unmanaged 8 port switch that feeds the machines in the garage, and > > which also claims to be a gigahertz capable switch. > > > > But file moves to/from the machines in the garage seems to indicate > > theres a slow connection of around 10Mb/s someplace in that path. > > Considering the type of machines you have it could be a storage > limitation, i.e. you're not going to get Gbit speeds from USB2 > attached storage. > > Check 'ethtool <network_device_name>' on each of those systems, > possibly one or more are connected at lower than 1Gbit. > > > Do we have a utitity that for troubleshooting purposes, can take the > > address of one of those machines, and somewhat like traceroute, but > > report the bandwidth capability of every box in that path including > > this machine and target addresses abilities? > > You can test the bandwidth with iperf. Run the server on one system > and test from each of the other systems. > So I ran the server on the rpi4, and tested as client from here, getting: gene@coyote:~$ iperf -c rpi4 -b iperf: option requires an argument -- b ------------------------------------------------------------ Client connecting to rpi4, TCP port 5001 TCP window size: 85.0 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.71.3 port 36322 connected with 192.168.71.13 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.09 GBytes 936 Mbits/sec
And popping back to the rpi4's ssh -Y login, I see a nearly identical report on its login screen: pi@rpi4:~ $ iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.71.13 port 5001 connected with 192.168.71.3 port 36322 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 1.09 GBytes 934 Mbits/sec Which tells me its the poor prolonged write speeds of the ssd's that are the main contributors to the slow big files problem. Not much I can do about that. It is what it is. > > Kind regards, > Andrei Cheers Andrei, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene>
