Hi, I know that rsync does an delta download. I need to kow one thing I have one big file on remote machine say 4 GB named abc.exe I do an rsync and get it to my local machine, after few days abc.exe is replaced my a new abc.exe ( say 5 GB) now when i do an rsync what is the expected behaviour ? can u explain in 2 or 3 line how delta is determined by rsync ? -- Thanks Chandu.B.S