DS-Bit: Delay-Sensitive BitTorrent-Based Data Synchronization Protocol

Abstract

Abstract The main purpose of BitTorrent is to download files for individual users, and there are problems such as slow startup speed, insensitive to time delay, and slow synchronization of large-scale network data. This paper analyzes the bottleneck of BitTorrent’s technical framework, and proposes delay-sensitive BitTorrent-based data synchronization protocol (DS-Bit). With the Pre-Connect strategy, we significantly reduces the impact of the delay between nodes in the system on the data synchronization time by sending messages in advance, and the delay-considered TFT rule (DCTFT) that considers the delay optimizes the choice of nodes to send data. Because the transmission rate of DS-Bit is too fast, if it is used for file downloads for individual users, the node that completed the first will exit the system early, which will reduce the total download rate of the system. Therefore, DS-Bit is mainly used for data synchronization between distributed servers.