Re: [vwrap] Statements of Consensus. Flexibity First.
Boroondas Gupte <sllists@boroon.dasgupta.ch> Wed, 30 March 2011 11:28 UTC
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Date: Wed, 30 Mar 2011 13:29:56 +0200
From: Boroondas Gupte <sllists@boroon.dasgupta.ch>
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Subject: Re: [vwrap] Statements of Consensus. Flexibity First.
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On 03/30/2011 03:14 AM, Carlo Wood wrote: > Perhaps we should also start a wiki page (it's nice > to have a stable url that one can refer to, which still > is editable; that give me at least a feeling of progress), > about statements that we reached consensus over. Good idea. > Being an abstract thinker and analyst, I believe we > can tackle many of the current discussions at a much > higer abstraction level first, making it easier, or > even possible, to deal with the more detailed points > of discussion. We'll probably have to switch back and forth between levels of abstraction during the discussion. A pure top-down design often won't work. But I feel it's indeed reasonable to start at a higher abstraction and see where we can go from there. > I'd like to start with one such statement and ask > for consensus on it (and if not, give your rationale > why not). > > > * Whenever a change X in the protocol is proposed > (which might be an addition, a change of existing > protocol or even deletion: any change, making > the protocol (VWRAP) go from A --> B), then that > change is accepted as part of VWRAP provided that: Formulated like this, it sounds like the following requirements together would be sufficient for acceptance. I guess you rather wanted to express that they should be necessary for acceptance, but might not be sufficient (further requirements might apply). > 1) Protocol B can do everything that A could do. > 2) No substantial extra demands are being made on > an implementation that only implements the > functionality of A. As necessary but not sufficient acceptance requirements, I can consent to these. I cannot consent to them as sufficient acceptance requirements. > In other words: we choose for flexibility. Or more specifically, total backwards compatibility between versions of VWRAP. However, to make it easy (or at least easier/possible) to design changes X or new versions B, such that they fulfill these backwards compatibility requirements, we should already design previous versions A for "forward compatibility". If I remember correctly, you have made suggestions in past messages on how to achieve such forward compatibility (e.g. protocol versioning combined with protocol negotiation). > Under no circumstances we want the *protocol* itself > to be a limitation in what is possible, when that > extra flexibility/possibility doesn't cost much for > those not needing or using it. Agreed. Cheers, Boroondas
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Boroondas Gupte
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dickson, Mike (ISS Software)
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- [vwrap] Statements of Consensus. Flexibity First. Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Mike Dickson
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Mike Dickson
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Mike Dickson
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Mike Dickson
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Boroondas Gupte
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Mike Dickson
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Izzy Alanis
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Izzy Alanis
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Carlo Wood
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Izzy Alanis
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Izzy Alanis
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Morgaine
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Dzonatas Sol
- Re: [vwrap] Statements of Consensus. Flexibity Fi… Izzy Alanis