Test the bittorrent sync, I had a check in real time the status of the network and cpu of raspberry pi all. As a result, cpu occupancy rate of raspberry pi which send files are 50-70%, 20-40% maximum network share was (100Mbps full-duplex). Raspberry pi some only to send / receive files, the problem is, not work raspberry pi most. Number of peer that is enabled seems to have been limited. The early sync, I was expected raspberry pi some become peer, after the first, peer and will increase. However, the results of my test, until all the files are sync, raspberry pe as a peer, there is only one to three. I want to know how can I raspberry pi all to send / receive at the same time.