I'm about to start a big rsync between two servers on my LAN.  Is it better for me to push the files from one server to the other or pull them (backwards)?There is not anything that would make one work, and the other not work -- I am just wondering if there is a reason (maybe speed) to do one over the other.Can anyone give me a good reason, or is there no reason to do one over the other?
Big rsync -- push or pull?
rsync
The way rsync algorithm works can be found from here.The algorithm identifies parts of the source file which are identical  to some part of the destination file, and only sends those parts which  cannot be matched in this way. Effectively, the algorithm computes a  set of differences without having both files on the same machine. The  algorithm works best when the files are similar, but will also  function correctly and reasonably efficiently when the files are quite  different.So it would not make a difference whether you are uploading or downloading as the algorithm works on checksums of the source and destination files. So, any file can be the source/destination. I find some more useful information from here. Some of the excerpts are,RSync is a remote file (or data) synchronization protocol. It allows  you to synchronize files between two computers. By synchronize, I mean  make sure that both copies of the file is the same. If there are any  differences, RSync detects these differences, and sends across the  differences, so the client or server can update their copy of the  file, to make the copies the same.RSync is capable of synchronizing files without sending the whole file    across the network. In the implementation I've done, only data    corresponding to about 2% of the total file size is exchanged, in    addition to any new data in the file, of course. New data has to be    sent across the wire, byte for byte.Because of the way RSync works, it can also be used as an incremental    download / upload protocol, allowing you to upload or download a file    over many sessions. If the current upload or download fails, you can    just resume it later.