DrFTPD is an FTP server written in Java. It does not handle transfers in the same way that normal FTP servers do. Instead, it merges multiple FTP sites into one, creating a distributed FTP site/FTP cluster containing one master and many slaves/nodes. When a client wants to transfer a file from DrFTPD, DrFTPD finds the slave which has the file, and tells the appropriate slave to transfer the file instead of handling it itself. This allows huge gains in total bandwidth and disk capacity.