Freenas fan

Entering --compress-level=0 in the expert settings completely overrides -z compression for all files. Now speed increase was around 5 (55 Mb/s) for my setup. Still half of what is possible with manual copying. But still.

Mucked around a bit more. To prevent file compression at least for some files go to expert settings and add: --skip-compress=tib This prevents compression of .tib files, for example. Speed increase was around 3.5 for my setup.

Since qtdsync uses compression by default (-z parameter), initial copying of large files is is dead slow. I have not found a way to get rid of this -z parameter. It can not be overridden in the expert settings. I therefore usually copy large files manually to the qtd target directory and thereafter let qtdsync do its job.