CFTP: a caching FTP server

By analyzing the log files generated by the UK National Web Cache and by a number of origin FTP sites we provide evidence that an FTP proxy cache with knowledge of local (national) mirror sites could significantly reduce the amount of data that needs to be transferred across already overused network s. We then describe the design and implementation of CFTP, a caching FTP se rver, and report on its usage over the first 10 months of its deployment. F inally we discuss a number of ways in which the software could be further e nhanced to improve both its efficiency and its usability. (C) 1998 Elsevier Science B.V. All rights reserved.