Re: [netmod] Instance-data-format - shall we define etag and last-modified annotation ?
Andy Bierman <andy@yumaworks.com> Tue, 23 July 2019 15:39 UTC
Return-Path: <andy@yumaworks.com>
X-Original-To: netmod@ietfa.amsl.com
Delivered-To: netmod@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5F882120398 for <netmod@ietfa.amsl.com>; Tue, 23 Jul 2019 08:39:11 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.898
X-Spam-Level:
X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=yumaworks-com.20150623.gappssmtp.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id k3JP1HHjwAkI for <netmod@ietfa.amsl.com>; Tue, 23 Jul 2019 08:39:08 -0700 (PDT)
Received: from mail-lj1-x22f.google.com (mail-lj1-x22f.google.com [IPv6:2a00:1450:4864:20::22f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A9E7F120428 for <netmod@ietf.org>; Tue, 23 Jul 2019 08:39:07 -0700 (PDT)
Received: by mail-lj1-x22f.google.com with SMTP id m8so7907752lji.7 for <netmod@ietf.org>; Tue, 23 Jul 2019 08:39:07 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yumaworks-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=vkKvwRCZYm3kNAvNIi+NfjkDOvo5KrkLpOes5Y5xi/k=; b=bgqg2Nk7wXiYi3itKxXxVqkDPADnr67ggiz7QoPWzOacw3ERsfCVOq3h3sHMWbxX1d W6bEVkb4NZ/LpZ68KyW/y2p2cY9WJtDXbYtWCvsZdeP8AcicEZn5NhNT7PD6IDhH6PRK CRsIt18Q48yGLOq+shRiIATCwJqSDjwqlcI/ho5jXqIDmvALnuKr2fu5F2QL2vYrxFhO MIuffxoSIHU2hz661rvKQIrlQq4dqHOZ/qaP//hAcw0xvc2vivrq4aA5ZqtWYZDzjwFF Rckj6/fsi4HRG5Hyp6oL0of/8fe0w2FoO1o9evgKMd40P8mzhM14pLcc+P/2N6NuKcrf SuCA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=vkKvwRCZYm3kNAvNIi+NfjkDOvo5KrkLpOes5Y5xi/k=; b=t0oTIOvzqIyhHu+qH8MveKkzUsrbekbMHsrLM77zjtl5+ZiHR9isVlRrXoNCheuwPe VbKBjKBszZpq0fta58HoyklFAfCYOAPdUx5fxtUUVQ25mzT+VpC+r4xHHwBGrPFz3fB4 jXK4cqnJ8MIa/zrdLvZdwsfNcRNc/IGfg3zafhXVi3PRJdaYLu2EJjtx1Rc6i1QmiT2T F2ZhnO5hhfEqOSF3BqEIKxbixXmbNlo8+nt8U3xyLUSp136hF2VJsErYEc/tUNhJbgBC ZwXlfCvU699VV3rdsgQnsoTxulQm0hlbIqEBZNLuvAlCX22jQmNbNLEjE4i/FsHkD5Ve v+1w==
X-Gm-Message-State: APjAAAV0lh+OCUmff1Ip2SBiAw2vjnPqebxnNSPnpz2ALZAEbSHBTsFq 90+SBr4mfBktWFNGAHC8J89M8MMhh//HCQ4R1VY0gQ==
X-Google-Smtp-Source: APXvYqycHa5qMcfv+BWJBvOIJfGUCBjUG5cEadcnRefOnwC6s7SlfrKOhSHieVwg7Xo9kMN1iEDM3tyCDAiF/KlOI44=
X-Received: by 2002:a05:651c:1b9:: with SMTP id c25mr11318854ljn.25.1563896345770; Tue, 23 Jul 2019 08:39:05 -0700 (PDT)
MIME-Version: 1.0
References: <VI1PR0701MB2286D806027F541651B0BCE6F0C40@VI1PR0701MB2286.eurprd07.prod.outlook.com> <20190722201510.mom7xg2mdi2ulbby@anna.jacobs.jacobs-university.de> <VI1PR0701MB2286001A8E05E099C066BF61F0C70@VI1PR0701MB2286.eurprd07.prod.outlook.com> <20190723142414.4sc5o2j6dawblwrm@anna.jacobs.jacobs-university.de>
In-Reply-To: <20190723142414.4sc5o2j6dawblwrm@anna.jacobs.jacobs-university.de>
From: Andy Bierman <andy@yumaworks.com>
Date: Tue, 23 Jul 2019 08:38:54 -0700
Message-ID: <CABCOCHQrAQaK2XEfnC9EPwhsu4+Qe=tPyLe-bT9=7x9t1LN3BQ@mail.gmail.com>
To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>, Balázs Lengyel <balazs.lengyel@ericsson.com>, "netmod@ietf.org" <netmod@ietf.org>
Content-Type: multipart/alternative; boundary="00000000000027d0ec058e5afe50"
Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/Pml-VmGyjgAqhXfQwF7pLSRAtjQ>
Subject: Re: [netmod] Instance-data-format - shall we define etag and last-modified annotation ?
X-BeenThere: netmod@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: NETMOD WG list <netmod.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/netmod>, <mailto:netmod-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/netmod/>
List-Post: <mailto:netmod@ietf.org>
List-Help: <mailto:netmod-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/netmod>, <mailto:netmod-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 23 Jul 2019 15:39:22 -0000
On Tue, Jul 23, 2019 at 7:24 AM Juergen Schoenwaelder < j.schoenwaelder@jacobs-university.de> wrote: > Balázs, > > I am not sure these belongs to the data types collection. If these > annotations are a per datastore properties or per configuration > datastore properties (I am not sure these properties make a lot of > sense for dynamically changing data in <operational>, or these > properties only make sense for config true nodes, more discussion > needed I guess), then the logical place would be to define them would > be where the datastores are defined. > > I understand the timing concern but my preference is to workout what > these annotations really are in an NMDA world and in a second step to > figure out a way to define them in a reasonable amount of time. > > This work needs a lot more thought because this WG is sort of abusing these fields, intended for HTTP caching. The values are associated with a representation of a response to a request for some portion of the datastore contents. E.g., a representation in XML must be a different ETag than a JSON representation (of the exact same datastore contents). I suggest new meta-data be defined that has semantics specific to datastore contents, not the HTTP representation of the response. IMO this meta-data is not really needed inside an instance file, but if included, then the values should be associated with the representation (the instance file) and not the datastores. /js > Andy > > On Tue, Jul 23, 2019 at 02:11:23PM +0000, Balázs Lengyel wrote: > > Hello Jürgen, > > Could the etag and last-modified annotations be moved to 6991bis? > > Regards Balazs > > > > -----Original Message----- > > From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> > > Sent: 2019. július 22., hétfő 16:15 > > To: Balázs Lengyel <balazs.lengyel@ericsson.com> > > Cc: netmod@ietf.org > > Subject: Re: [netmod] Instance-data-format - shall we define etag and > > last-modified annotation ? > > > > On Mon, Jul 22, 2019 at 07:23:59PM +0000, Balázs Lengyel wrote: > > > Hello, > > > > > > Restconf (rfc8040) defined to useful bits of metadata about a YANG > > > defined > > > datastore: entity-tag and the last-modified timestamp. > > > > > > These can be very useful in instance data sets, however Restconf > > > defines an encoding for these (as part of the http headers) that can > > > not be used in instance-data-sets. > > > > This may actually point out a flaw or omission of RFC 8527. RFC 8040 > defines > > an entity-tag for its "unified" datastore and it says "if the RESTCONF > > server is co-located with a NETCONF server, then this entity-tag MUST be > for > > the "running" datastore". So it is a bit unclear what happens with other > > NMDA datastores and I did not quickly find something in RFC 8527. (For > > example, can have a distinct etag for <startup/>? > > > > > draft-ietf-netmod-yang-instance-file-format-03#section-7.2 > > > > > < > https://tools.ietf.org/html/draft-ietf-netmod-yang-instance-file-format-03# > > > section-7.2> defines metadata annotations for these two, that can > be > > > used in instance data > > > > > > md:annotation entity-tag { > > > type string; > > > description "Used to encode the entity-tag ."; > > > } > > > md:annotation last-modified { > > > type yang:date-and-time; > > > description "Contains the date and time when the annotated > > > instance was last modified (or created)."; > > > } > > > > > > In order to be able to include this data, the annotations need to be > > > defined in some YANG module. > > > > > > The question has been raised whether > > > > > > 1. these annotations should be defined in the ietf-yang-instance-data > > > module as it needs them, as that is open or > > > 2. the annotations should be defined in another draft in a separate > > > YANG module as any other annotation > > > > > > The first option is better because the instance-data needs these > > > annotations, and at this point we see no other user for the > > > annotation, and in this case the ongoing instance data draft will > > > define it > > > > > > The second option is better because, if later there are other users > > > for these annotations, it might be strange to reference the > > > ietf-yang-instance-data module. Also why provide special treatment to > > > these > > > 2 annotations? > > > > > > The authors support option 1 and don't have the time to start a new > > > draft to define these annotations. > > > > > > On IETF105 in the room there was more support for option 1. > > > > > > Please indicate if you have an opinion about the choice of 1 or 2 > > > > Version -03 only defines these annotations but does not do anything > specific > > with these definitions. So if the annotations are defined elsewhere, the > ID > > is as complete as before. If entity-tag and last-modified are actually > seen > > as datastore properties, it would be nice to have them defined in the > NMDA > > documents (and it seems we overlooked this when we did the NMDA work). > > > > I think this needs a bit of discussion whether these are actually seen as > > datastore properties. But in this case, I would lean towards option 2. > > > > /js > > > > -- > > Juergen Schoenwaelder Jacobs University Bremen gGmbH > > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > > Fax: +49 421 200 3103 <https://www.jacobs-university.de/> > > > > -- > Juergen Schoenwaelder Jacobs University Bremen gGmbH > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > Fax: +49 421 200 3103 <https://www.jacobs-university.de/> > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod >
- [netmod] Instance-data-format - shall we define e… Balázs Lengyel
- Re: [netmod] Instance-data-format - shall we defi… Juergen Schoenwaelder
- Re: [netmod] Instance-data-format - shall we defi… Balázs Lengyel
- Re: [netmod] Instance-data-format - shall we defi… Juergen Schoenwaelder
- Re: [netmod] Instance-data-format - shall we defi… Andy Bierman
- Re: [netmod] Instance-data-format - shall we defi… Kent Watsen
- Re: [netmod] Instance-data-format - shall we defi… Balázs Lengyel
- Re: [netmod] Instance-data-format - shall we defi… Rob Wilton (rwilton)
- Re: [netmod] Instance-data-format - shall we defi… Joe Clarke (jclarke)
- Re: [netmod] Instance-data-format - shall we defi… Rob Wilton (rwilton)
- Re: [netmod] Instance-data-format - shall we defi… Balázs Lengyel