I am using bittorrent sync pro last version. I am getting saw-tooth type of speed when I am synchronizing computers that are far away. The speed is going slowly form 0 to the maximum upload speed of 10mb/s, stay there for 0 to a few seconds then dips to 0 and is up slowly again. The two computers are 11000 kms away. Ping time is around 260-300ms; files are 2 to 6GB. When I synchronise computers within the same country I have a steady 10mb/s. So one could believe the reason is the distance but when I use Filezilla to download files I have a stable 10mb/s. I have been trying to change the size of the buffers , small or big it doesn't affect the shape. This is not new and happen since the beginning 3 years ago. Can anybody explain what is happening ? Is there anything that can be done to improve the speed?
