<p><span style="font-family: sans-serif; color: #000000; font-size: small;"><span style="font-size: 13px; line-height: 19px;"><span style="font-family: Verdana, sans-serif; font-size: 12px; color: #494949; white-space: pre-wrap;">A BitTorrent tracker is a server software based on BitTorrent protocol. Download clients are required to firstly communicate with the tracker to get other peers which have already begun downloading the same file that the clients want to get. During the download, tracker randomly and periodically provides clients newer peers which have joined the same download group. Optimize the tracker by using GeoTool so that the tracker can provide clients the nearest peers through geographical coordinates and therefore speed up the entire download time. </span></span></span></p><p><span style="line-height: 19px; white-space: pre-wrap;"><span style="line-height: 20px; white-space: normal;"><br /></span></span></p>