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I
echo Tom Petch’s concern. Given
the level of deployment success of IETF management efforts for
the last 5-10 years, I’d suggest that we need both customer “pull”
as well as technical community “push” for such an effort to succeed.
While there have been arguments made for the latter, I
don’t see enough evidence of customer (in particular, operator) involvement
to feel confident that the former has been addressed. David
Harrington said: “The
people who believe that YANG is more expressive and better suited for
this poarticular purpose include contributors to the design of SMIv2,
MIB Doctors, members of the NMRG who helped develop the SMING information
and data modeling language, contributors to the SMIng WG which
worked on developing a proposed SMIv3 to converge the SMIv2 standard
and the SPPI data modeling language standard and the NMRG SMING
approach, and engineers who have multiple independent implementations
of running code for Netconf data modeling.” Tom
Petch said: “Sounds
magnificent but who are these people and where are they? I
do track the YANG and NGO mailing lists and what I see there worries me. I see
a significant number of questions along the lines; of what does this mean, how
can this ever work, how can I do ... and the questions are all very reasonable
and need answers - which they mostly get, even if they are somewhat too
often along the lines of 'oh dear', or 'more work needed'. But
they are the sort of questions I, for all I have done with SMI, ASN.1 and other
languages, would not have thought to ask; they come from someone at the sharp
end writing code for today's boxes. Yet these questions are almost all coming
from just one person with a specific market place, and if he can find so many
doubts and queries, how many more are there waiting to be discovered? That
one person - hi, Andy! - is doing a magnificent job but for a new language to
live up to its billing, we need half a dozen such people, from different parts
of O&M to find the holes; and I just do not see them, at least not on the YANG
and NGO mailing lists. The
answers, likewise, mostly come from the same three or so people; again, I am concerned
that there are not more, given the claims of yang. This
causes me to doubt that we, the IETF, really has the community of interest to
undertake such a challenging assignment. Tom
Petch” |
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