From Xtreme changelog
- - added new column to shared files: sharefactor.
+ first value is the value which the new auto-upload-priority oriented towards (only visable when advanced auto-prio is used)
+ second value is the relationship between transferred data and file-size
the releation between wanted upload and uploaded data. The wanted upload increase with the completed size. Also the wanted upload increases when I file is more rare in relation to the other files. It decrases if the file is very well spread.