Le 09/05/2019 à 11:46, Lothar Schilling a écrit :
Am 09.05.2019 um 11:14 schrieb Jonas Smedegaard:Quoting Lothar Schilling (2019-05-09 10:49:32)for years I have used CentOS for our server landscape. Now I decided to give Debian a try.Welcome to Debian!I sincerely hope you will appreciate Debian.I just set up a Stretch 9.8 system supposed to become our main backup server. So I set up a backup job wih rsync. But the going is really very very slooooow. Trying to figure out what's happening: * iperf -c [host] => bandwith almost 1000 Mbit, that's fine. * dd if=/dev/zero of=/daten/testfile bs=1G count=10 oflag=direct => 10737418240 Bytes (11 GB, 10 GiB) kopiert, 40,4992 s, 265 MB/s, so that's fine as well But whenever I try to rsync, cp or scp - whether copy files on the local hard disk only or over the network - speed goes down to 500 kB/s. Filesystem is ext4. I don't have any clue about what's going on. Any kind of help would be appreciated, thank you!Is _only_ transfer speed affected? I am no expert in this, but imagine that if you rsync massive amounts involving hardlinks then memory becomes a problem too. Perhaps run atop to monitor bottlenecks live - JonasIt is most definitely not a memory or cpu problem. It's a HP Proliant with 32 GB RAM and a Intel Xeon CPU 2.40GHz with 4 cores. Also the problem stays the same if I just copy one large file.
Check if it's related to the disk speed (hdparm and/or iotop). Kevin
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