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Re: [ietf-smtp] Draft for compressing SMTP streams

2016-09-15 15:58:13
Hi all,

Le 18/08/2016 à 23:09, John Bucy a écrit :
On Thu, Aug 18, 2016 at 10:40 AM, John R Levine <johnl(_at_)taugh(_dot_)com
<mailto:johnl(_at_)taugh(_dot_)com>> wrote:

    Took out smime, since this discussion has nothing to do with it.

        Modern Word and Excel files are in ZIP container formats.
        Therefore, they are already compressed. [Looks like Paul Smith
        already posted about this.]


    Oh, right, forgot about that.

    It's looking to me like there are two places where CDAT might be
    useful. One is to squeeze base64 encoded stuff back to about its
    original size. The other, since the compressor is deliberately not
    reset between messages, is when you send approximately but not quite
    the same message to several people in the same session, e.g.,
    different text with the same attachments.  Imagine you're an ESP
    sending tarted up mail with lots of images, and each recipient's
    name is spliced into the text of his message.

I also believe CDAT would be useful for these two cases.
It will result in a gain of speed, and band-width optimization. Even though band-width become larger and larger, it is still a limited resource; not everybody has a chance to have an optical fiber coming to his home, and anyway band-width has a cost (so saving it is interesting, notably when more and more connected devices use it).

I don't think we should prevent extending protocols for the mere reason that deploying it will take years. We wouldn't improve many things otherwise.


Agree with this. We (gmail) are still interested but it isn't our
highest priority. The draft seems straightforward, I can probably
prototype it on our smtp gateway in a few days when I can find the time.

I hope you'll manage to find time to prototype CDAT and confirm it is really useful for the two cases mentioned above.

--
Julien ÉLIE

« Nigro notanda lapillo. » (Catulle)

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