Currently I am suspecting it is the prep work Duplicati does on the machine itself. It is Duplicati 2.0.2.8 with QMono 4.2.1.0 running on a QNAP TS-559 Pro+
All ftp tests using the same route showed >60MByte/sec.
Duplicati seems to run only on one core at a time (poor overlap on peaks on cores) and a lot of idle time…
I already set the options:
–zip-compression-level=0
–disable-streaming-transfers=false
–synchronous-upload=false
–thread-priority=abovenormal
–throttle-upload=100MB
Any further thoughts?
Thanks,
Mike