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I backup files using rsync from RHEL Linux to Windows 10 Pro using SMB/CIFS share. It works fine except it is much slower than Linux to Linux. Both computers are fairly modern Dell OptiPlex, having 6-core CPUs, 16GB memory, NVMe disks, 1 GigE NICs. Linux top utility does not show any bottleneck on CPU/memory/IO, screenshot attached. Where else could be the bottleneck? top-cpu-mem-io usage

Vinod Gupta
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When syncing to a SMB/CIFS share rsync needs to read the whole share to compare the files...

You should run a rsync daemon on windows to let it do the comparison of the files. This will speed things up.

In Cygwin you can install rsync and cygrunsrv package. To install as a service: cygrunsrv.exe -I rsync -p /bin/rsync -a "--daemon --no-detach"

Virsacer
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  • Agree, that will help. However, without running rsync daemon, I should see high i/o and CPU usage, which is not the case. – Vinod Gupta Jun 20 '22 at 04:56