IPP Mail Archive: IPP> FW: Of HTTP/1.1 persistent connection

IPP Mail Archive: IPP> FW: Of HTTP/1.1 persistent connection

IPP> FW: Of HTTP/1.1 persistent connections and TCP Keepalive timers

From: Manros, Carl-Uno B (cmanros@cp10.es.xerox.com)
Date: Thu Nov 02 2000 - 14:14:36 EST

  • Next message: Mike Bartman: "RE: IPP> FW: Of HTTP/1.1 persistent connections and TCP Keepalive timers"

    Here is yet another comment of interest.

    Carl-Uno

    Carl-Uno Manros
    Principal Engineer - Xerox Architecture Center - Xerox Corporation
    701 S. Aviation Blvd., El Segundo, CA, M/S: ESAE-231
    Phone +1-310-333 8273, Fax +1-310-333 5514
    Email: manros@cp10.es.xerox.com

    -----Original Message-----
    From: Fielding, Roy [mailto:fielding@eBuilt.com]
    Sent: Thursday, November 02, 2000 10:08 AM
    To: 'Jeff.Hodges@kingsmountain.com'; http-wg@hplb.hpl.hp.com
    Subject: RE: Of HTTP/1.1 persistent connections and TCP Keepalive timers

    The decision on when to close is left to either side. A server will
    close the connection based on its resource-consumption requirements
    which may vary substantially based on the type of server and the
    number of clients it is intended to serve. A client will close the
    connection if it is connection-limited and needs to open many other
    connections, or if it just believes in being network friendly.

    Unfortunately, none of the major browsers are network friendly,
    so they typically ignore the connection (not even recognizing FIN
    as an event) until they later attempt to use it again. Most
    general-purpose servers have a short activity time-out on
    connections and will close the connection after that time-out
    (typically under 10 seconds, though a high-activity server will
    set this to one second or turn off persistent connections altogether).

    Cheers,

    Roy T. Fielding, Chief Scientist, eBuilt, Inc. (www.ebuilt.com)
                     Chairman, The Apache Software Foundation (www.apache.org)



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