RE: [wsdm] Proposal on [Disc04]

["Sedukhin, Igor S" <Igor.Sedukhin@ca.com>]

William,

This will require manageability providers to know of other manageability providers for the same resource. I do not think it is always reasonable.

If I implemented a co-located manageability provider that offers resource state capability for a warehouse Web service, and then someone else implemented a proxy manageability provider offering metrics capability for the same service, they are not necessarily aware of each other. Morevover, they could be developed and instrantiated completely independently of each other.

So, my point is
 1) relationship may be defined for the cases where providers are aware of each other
 2) for the general case, in the spec, we just say a) fetch ResourceID, b) discover all manageability endpoints with a given ResourceID c) there could be more (with different ResourceIDs), so use "correlatable properoperties" capability (TBD).

The idea behind c) is that
	- fetch all properties marked "correlatable"
	- use generalized discovery to find all manageable resources with matching "correlatable property" values

For example, a SCSI HDD could mark the following properies as "correlatable": host DNS name/IP, Bus#, Channel#, SCSI#, LUN#.

To be even more concrete I suggest to define "Correlatable Properties" capability as follows :)
	1) a property muws-xs:CorrelatableProperties
	2) value of which follows the example below

	<muws-xs:CorrelatableProperties>
		<muws-xs:MatchAny>
			<muws-xs:Match>scsi:HostName</muws-xs:Match>
			<muws-xs:Match>scsi:HostIP</muws-xs:Match>
		<muws-xs:MatchAny>
		<muws-xs:Match>scsi:BusID</muws-xs:Match>
		<muws-xs:Match>scsi:ChannelID</muws-xs:Match>
		<muws-xs:Match>scsi:ID</muws-xs:Match>
		<muws-xs:Match>scsi:LUN</muws-xs:Match>
	</muws-xs:CorrelatableProperties>

	3) no events or operations are necessary

-- Igor Sedukhin .. (igor.sedukhin@ca.com)
-- (631) 342-4325 .. 1 CA Plaza, Islandia, NY 11788

-----Original Message-----
From: Vambenepe, William N [mailto:vbp@hp.com] 
Sent: Friday, May 28, 2004 6:21 PM
To: wsdm@lists.oasis-open.org
Subject: [wsdm] Proposal on [Disc04]


Hi all,

As promised, here is a proposal for [Disc04].

> [Disc04]
> From one manageability endpoint to other manageability endpoints of 
> the same resource (to discover all the manageability capabilities 
> offered), including endpoints from the same and different 
> manageability Providers.
> We discussed that one 2 weeks ago but didn't talk about any way to 
> address it yet.

This proposal too rests on using relationships. It is simply to create a special relationship type, called something like "sameResource" or "alternateManageabilityRepresentation". A Ws-Resource representing resource foo will advertise this relationship between itself and the other known WS-Resources that also represent foo.

Simple and clean, don't you think?

Therefore I propose we also hibernate this issue with the assumption that relationships will provide the right mechanism (of course, to be validated once we actually have relationships).

William

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