--On Friday, March 30, 2001 3:19 PM -0500 Abdallah Rayhan
<arayhan@nortelnetworks.com> wrote:
>
> I believe the purpose of what we doing here is to come up with
> something that is efficient and practical to implement. CIM might
> be favored from a standard-like architecture but when it comes
> it to implementation, from my experience, it is not the first
> choice of designers. Furthermore, it does not represent a data
> model that is particularly compatible with any platform, thereby
> making implementation difficult and non-deterministic. The CIM
> schema is also less optimal for representation of data for
> management purposes. INHO, CIM's use of XML is sub-optimal for
> a protocol purposes. I think an infomodel/XML Schema designed
> with this in mind would be too heavyweight for protocol purposes.
>
I think on the layer we are talking, protocol efficiency is not the major
issue. More important is that customer-provider and provider-provider
interaction is based on one information model.
[...]
> The question is: Should we define a representation of an SLA,
> then figure out how to transport it? Or should we define the
> protocol, and then optimize the storage? I think the latter
> makes sense in protocol design. Take the policy LDAP schema for
> instance... it is not optimized storage for the delivery protocols
> (SMTP, COPS-PR). It is however optimized for LDAP representation,
> which presumably makes it convenient for LDAP-speaking devices
> and management clients.
>
Looking at PCIM LDAP schema you may be right. Looking into the device
model, I am not so sure. At least the mapping to MIBs and PIB is straight
forward, because the same information model is used for all the efforts.
MArcus
> my 2 cents
>
> regards
> Abdallah
>
> LAVERGNE Laurent DvSI/SIReS/LAN wrote:
>>
>> I don't understand the point. Is SLS looking for an modeling language to
>> describe the SLS information (for real time negociation) or is it looking
>> for an existing information model to plug to?
>>
>> I think I agree with the first part of the previous message and don't
>> understand the need of CIM (or even PCIM), someone could perhaps explain
>> me this.
>>
>> regards
>> L.Lavergne, France Telecom
>
--------------------------------------
Dr. Marcus Brunner
C&C Research Laboratories
NEC Europe Ltd.
E-Mail: brunner@ccrle.nec.de
WWW: http://www.ccrle.nec.de/
personal home page: http://www.tik.ee.ethz.ch/~brunner
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