Transmission

https://gist.github.com/Adadov/e352c05c ... 23509a02da
gives a tracker-replace.sh ....

I use transmission-remote -l to gather information on my torrents into a Libre Office Calc sheet.
I get :
patrice@internity:~$ transmission-remote -l
ID Done Have ETA Up Down Ratio Status Name
1 100% 823.3 MB Done 0.0 0.0 8.0 Idle NextCloudPi_03-17-18
Sum: 823.3 MB 0.0 0.0
patrice@internity ...

I finally found the cause of this behavior :
The "sky-rocket" ratios are caused by the re-seeding an incomplete torrent.
I had a whole TV serie on my disk.
I got a torrent file for this serie
I opened it : after verification of the files, a little .nfo file was missing; I has been downloaded almost ...

Running transmission 2.84 (14307) on a Raspberry PI 2 under OSMC. (Debian Jessie up to date))
Gui is transmission-remote-gui 5.0.1 on Linux Mint 18.1 Serena 64-bit.

This is a fresh install (less than one month).
I activated the ratio limit and I got impossible results :
ratio of 1569.689 , 724.414 ...