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DATA AND FILE TRANSFER - SOME MEASUREMENT RESULTS (RFC0573)

IP.com Disclosure Number: IPCOM000172885D
Original Publication Date: 1973-Sep-01
Included in the Prior Art Database: 2008-Oct-23
Document File: 9 page(s) / 19K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Bhushan: AUTHOR

Abstract

During the last six months, we have been monitoring (although not continuously) the performance of our FTP-user and FTP-server programs. The purpose of this paper is to 1) discuss measurement criteria, 2) describe the measurement facilities, 3) report the relevant measurement results, 4) discuss the significance of results and compare them with other measurement data, and 5) ask for suggestions on our measurement and summarizing procedures.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 14% of the total text.

Network Working Group                                         A. Bhushan Request for Comments: 573                                         MIT-DM NIC: 19083                                             14 September 1973

            DATA AND FILE TRANSFER - SOME MEASUREMENT RESULTS

    During the last six months, we have been monitoring (although not    continuously) the performance of our FTP-user and FTP-server    programs.  The purpose of this paper is to  1) discuss measurement    criteria,  2) describe the measurement facilities, 3) report the    relevant measurement results,  4) discuss the significance of results    and compare them with other measurement data, and 5) ask for    suggestions on our measurement and summarizing procedures.

I. THE MEASUREMENT CRITERIA

   The FTP (Ref. "The File Transfer Protocol", by Abhay Bhushan, NWG/RFC    354, NIC 10596, ) may be considered a facility for data transfer    between file systems.  The relevant measurement parameters for a data    transfer facility are:

   1) Transfer rate (both peak and average, measured in bits per second)    which determines the throughput of the data transfer facility.

   2) Response time or delay (measured in seconds) which determines the    "interactibility" of the facility.

   3) Processing cost (measured in dollars or cpu-seconds per megabit    transferred) for transferring the data between the network and the    file system.  This is only one component of the cost of transferring    data, the other component being the communication cost (including IMP    processing costs) which we take as given.

   4) Failure-to-connect rate - average time elapsed between failures to    connect to the facility (measured in hours).  Failures could be in    the Host (processor and file system) hardware or software, or in the    IMPs and telephone lines.

   5) Availability - the percentage of time a given facility is    available, or alternately the probability of finding the facility    available at a given time.

   6) Accuracy - measured by the probability of error in transferring    bits, bytes, blocks, or files.

Bhushan                                                         [Page 1]
 RFC 573                  DATA AND FILE TRANSFER           September 1973

 II.  THE MEASUREMENT FACILITIES

   The MIT-CMS survey program (ref. "A Report on the Survey Project" by    Abhay Bhushan, NWG/RFC 530, NIC 17375) measures the response-time,    failure-to-connect rate, and availability of the Host-logger facility    (on socket 1).  Our preliminary experiments have indicated that the    corresponding measurement results for the FTP...