IPP Mail Archive: Re: IPP> Duplicate ippget events

Re: IPP> Duplicate ippget events

From: Michael Sweet (mike@easysw.com)
Date: Fri Jul 27 2001 - 15:43:56 EDT

  • Next message: Marty Joel: "Re: IPP> Duplicate ippget events"

    Marty Joel wrote:
    >
    > Hi Michael,
    >
    > I agree with everything you've said.
    >
    > Actually, notify-sequence-number is what should be used by the client to
    > ignore duplicates. For each subscription that matches its
    > Get-Notifications (usually only 1 subscription), it needs to know that
    > subscription ID and the last notify-sequence-number it received. That
    > requires very little work on the part of the client.
    > ...

    Hmmm, from an implementation standpoint, it would be better if the
    client could send the last sequence number is has received to the
    server, so the server would only have to send events whose sequence
    number is > the one provided. E.g., a client sends a server the
    "notify-sequence-number" attribute in the Get-Notifications request,
    and the server responds only with those events that have a higher
    sequence number. This would also reduce the bandwidth used...

    Thoughts? 

    -- 
______________________________________________________________________
Michael Sweet, Easy Software Products                  mike@easysw.com
Printing Software for UNIX                       http://www.easysw.com

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