Re: [rtcweb] Meaning of SHOULD support/use interleaving
Harald Alvestrand <harald@alvestrand.no> Mon, 27 October 2014 18:27 UTC
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Date: Mon, 27 Oct 2014 11:23:14 -0700
From: Harald Alvestrand <harald@alvestrand.no>
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Subject: Re: [rtcweb] Meaning of SHOULD support/use interleaving
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On 10/27/2014 07:19 AM, Christer Holmberg wrote: > Hi, > >>> Within the CLUE WG, we had a discussion regarding the following statement in section 6.1 of draft-ietf-rtcweb-data-channel-12.txt: >>> >>> "The support for message interleaving as defined in >>> [I-D.ietf-tsvwg-sctp-ndata] SHOULD be used." >>> >>> First, it is a little unclear what "the support SHOULD be used" means. >> My understanding is that SCTP implementations supporting the extension will use it. >> This is negotiated during the setup of the SCTP association. > If it's done on SCTP level, why do we need to talk about it in the data channel draft? > > Is there a reason why it is important to use it for data channels? If so, does it apply to data channels in general? NDATA was added in order to avoid head-of-line blocking on the transport (if I understand this correctly, until this was added, sending a huge message would block the delivery of small messages on all channels until the huge message was fully delivered). Unlike Michael, I see no reason to make this a SHOULD; I think it should be a MUST, and the older implementations in browsers should just be called out as non-conformant. That said, I think that data channels ought to interoperate successfully with implementations that don't support the extension - but data channel implementations in WebRTC endpoints should be under a "MUST implement, MUST offer" ruleset. > > Regards, > > Christer > > > > Whether messages are interleaved or not depends on the stream scheduler. This is a sender side only decision. The receiver has to deal with it. > It is not a MUST, since there are implementations now in use which don't support the extension. > > Best regards > Michael >> >> Second, does it mean that any data channel protocol (e.g CLUE) SHOULD use interleaving, even if the characteristics of the protocol wouldn't require it? >> >> Regards, >> >> Christer >> _______________________________________________ >> rtcweb mailing list >> rtcweb@ietf.org >> https://www.ietf.org/mailman/listinfo/rtcweb > _______________________________________________ > rtcweb mailing list > rtcweb@ietf.org > https://www.ietf.org/mailman/listinfo/rtcweb -- Surveillance is pervasive. Go Dark.
- [rtcweb] Meaning of SHOULD support/use interleavi… Christer Holmberg
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Christer Holmberg
- Re: [rtcweb] Meaning of SHOULD support/use interl… Harald Alvestrand
- Re: [rtcweb] Meaning of SHOULD support/use interl… Christer Holmberg
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Harald Alvestrand
- Re: [rtcweb] Meaning of SHOULD support/use interl… Christer Holmberg
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Christer Holmberg
- Re: [rtcweb] Meaning of SHOULD support/use interl… Makaraju, Maridi Raju (Raju)
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Harald Alvestrand
- Re: [rtcweb] Meaning of SHOULD support/use interl… Martin Thomson
- Re: [rtcweb] Meaning of SHOULD support/use interl… Eric Rescorla
- Re: [rtcweb] Meaning of SHOULD support/use interl… Justin Uberti
- Re: [rtcweb] Meaning of SHOULD support/use interl… Christer Holmberg
- Re: [rtcweb] Meaning of SHOULD support/use interl… Makaraju, Maridi Raju (Raju)
- Re: [rtcweb] Meaning of SHOULD support/use interl… Makaraju, Maridi Raju (Raju)
- Re: [rtcweb] Meaning of SHOULD support/use interl… Harald Alvestrand
- Re: [rtcweb] Meaning of SHOULD support/use interl… Christer Holmberg
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Christer Holmberg
- Re: [rtcweb] Meaning of SHOULD support/use interl… Eric Rescorla
- Re: [rtcweb] Meaning of SHOULD support/use interl… Makaraju, Maridi Raju (Raju)
- Re: [rtcweb] Meaning of SHOULD support/use interl… Christer Holmberg
- Re: [rtcweb] Meaning of SHOULD support/use interl… Paul Kyzivat
- Re: [rtcweb] Meaning of SHOULD support/use interl… Mo Zanaty (mzanaty)
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Paul Kyzivat
- Re: [rtcweb] Meaning of SHOULD support/use interl… Mo Zanaty (mzanaty)
- Re: [rtcweb] Meaning of SHOULD support/use interl… Christian Groves
- Re: [rtcweb] Meaning of SHOULD support/use interl… Makaraju, Maridi Raju (Raju)
- Re: [rtcweb] Meaning of SHOULD support/use interl… Mo Zanaty (mzanaty)
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Mo Zanaty (mzanaty)
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Michael Tuexen
- Re: [rtcweb] Meaning of SHOULD support/use interl… Mo Zanaty (mzanaty)