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Re: [netmod] Last Call: <draft-ietf-netmod-nmda-diff-09.txt> (Comparison of NMDA datastores) to Proposed Standard

Andy Bierman <andy@yumaworks.com> Fri, 18 June 2021 20:48 UTC

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From: Andy Bierman <andy@yumaworks.com>
Date: Fri, 18 Jun 2021 13:48:27 -0700
Message-ID: <CABCOCHQBdsr9mU4NDnGX0QibyyXbneCNKxtZ3_4=V0-PGhGvmg@mail.gmail.com>
To: Last Call <last-call@ietf.org>
Cc: Joel Jaeggli <joelja@gmail.com>, draft-ietf-netmod-nmda-diff@ietf.org, NetMod WG Chairs <netmod-chairs@ietf.org>, NetMod WG <netmod@ietf.org>, Robert Wilton <rwilton@cisco.com>
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Subject: Re: [netmod] Last Call: <draft-ietf-netmod-nmda-diff-09.txt> (Comparison of NMDA datastores) to Proposed Standard
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Hi,

I tried to get a couple companies interested in this draft but it did not
really work for them.
There is low demand for an NMDA diff but high demand for a more general
"YANG data compare" operation.

The main issues raised were:

1) can only compare 2 datastores
    Want to compare a datastore to a backup (or more generally a URI, ala
copy-config)

2) The output is only YANG Patch
    Want a "config" container that can be used with the "edit-config"
operation.
    NETCONF clients cannot use the YANG patch format to edit a datastore
with the differences

3) Not interested in the complex filtering and "origin" attributes
    Not applicable to the use-case.

The main use-case:

  1) make a backup of a server (or already have a common baseline shared
across servers)
  2) make config changes to the server and test them out
  3) get a diff that can be used as a "patch" to the backup
  4) apply the patch to different servers (that are running a compatible
config as the backup or baseline)

I realize there are no standard "backup" and "restore" operations so I am
not suggesting
that the draft be redone to support this use-case.


Andy


On Fri, Jun 18, 2021 at 6:36 AM The IESG <iesg-secretary@ietf.org> wrote:

>
> The IESG has received a request from the Network Modeling WG (netmod) to
> consider the following document: - 'Comparison of NMDA datastores'
>   <draft-ietf-netmod-nmda-diff-09.txt> as Proposed Standard
>
> The IESG plans to make a decision in the next few weeks, and solicits final
> comments on this action. Please send substantive comments to the
> last-call@ietf.org mailing lists by 2021-07-02. Exceptionally, comments
> may
> be sent to iesg@ietf.org instead. In either case, please retain the
> beginning
> of the Subject line to allow automated sorting.
>
> Abstract
>
>
>    This document defines an RPC operation to compare management
>    datastores that comply with the NMDA architecture.
>
>
>
>
> The file can be obtained via
> https://datatracker.ietf.org/doc/draft-ietf-netmod-nmda-diff/
>
>
> The following IPR Declarations may be related to this I-D:
>
>    https://datatracker.ietf.org/ipr/3084/
>
>
>
>
>
>
>

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