On 5.3.2015, at 11.19, internet-dra...@ietf.org wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Home Networking Working Group of the IETF.
>
> Title : Distributed Node Consensus Protocol
> Authors : Markus Stenberg
> Steven Barth
> Filename : draft-ietf-homenet-dncp-01.txt
> Pages : 28
> Date : 2015-03-05
>
> Abstract:
> This document describes the Distributed Node Consensus Protocol
> (DNCP), a generic state synchronization protocol which uses Trickle
> and Merkle trees. DNCP is transport agnostic and leaves some of the
> details to be specified in profiles, which define actual
> implementable DNCP based protocols.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-homenet-dncp/
>
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-ietf-homenet-dncp-01
>
> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=draft-ietf-homenet-dncp-01
Appendix C. Changelog
draft-ietf-homenet-dncp-01:
o Fixed keep-alive semantics to consider unicast requests also
updates of most recently consistent, and added proactive unicast
request to ensure even inconsistent keep-alive messages eventually
triggering consistency timestamp update.
o Facilitated (simple) read-only clients by making Node Connection
TLV optional if just using DNCP for read-only purposes.
o Added text describing how to deal with "dense" networks, but left
actual numbers and mechanics up to DNCP profiles and (local)
configurations.
Also added one relatively major outstanding issue - how to deal with ‘big
data’; even given TCP, currently there is limit of 64kb that a node can
publish, and updates of that data are inefficient. Several alternative schemes
underoing design, watch this space :)
So not quite LC-ready after all; the first change especially was critical, as
under heavy load there was flapping due to the new (passive) keepalive
definition of dncp-00 being somewhat more strict in what it accepts as
‘present’, compared to hncp-02 ping scheme).
Cheers,
-Markus
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