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
- Jonas