Hi all, The attached is the agreed definition for service, resource, entity and manageable resource based on today's protracted discussion. Fred's text (meat) is also included. I will do global search glossary doc and ogsa v1 doc for possible inconsistencies. I guess we don't have many. Thanks, ---- Hiro Kishimoto
-----Original Message----- From: owner-ogsa-wg@ggf.org [mailto:owner-ogsa-wg@ggf.org] On Behalf Of Hiro Kishimoto Sent: Thursday, November 18, 2004 7:28 AM To: 'ogsa-wg' Subject: Glossary service vs. resource (RE: [ogsa-wg] Proposed agenda for Nov. 17th call)
Hi all,
From the telecon minutes of 20 Oct. 2004 Action: Hiro to do a first try on 'service' & 'resource' wrt the above discussion and discuss with a small group before bringing back to the call.
The attached is my draft proposal for definition of service, resource, entity, manageable resource, and manageable entity with feedbacks form Dave Snelling and Fred Maciel.
My proposal is
(a) Service = Web service
Dave: This is OK, although some may argue that there are services of interest that are not Web Services.
Fred: Agreed. We could mention that OGSA concerns only Web services, and any service that's not a Web service is not part of the OGSA framework.
Hiro: Agreed that OGSA v1.0 chooses Web service as its infrastructure. But OGSA does not prohibit the other plumbing.
(b) Resource = entity (= stateful resource defined by WSRF)
Dave: WSRF-Resource(*) defines a resource is an entity that has the following characteristics: - It MUST be identifiable; a resource has at least one resource identifier (see Section2.2). - It MUST have a set of zero or more properties which are expressible in XML infoset. - It MAY have lifecycle.
Fred: I disagree. I think that in the real world not everything in a Grid will be manageable. Suppose that you have a host that's not manageable (say, you lost the root password -- you can only run jobs on it, press the reset button if things go wrong, and nothing else). It is still an entity, but I don't think that it is a resource. I think that the word resource implies that you may not only use it but also manipulate it (monitor it,
provision it or provision stuff on it, change its IP address or reboot it remotely, etc.).
Hiro: Everything is "resource" but not "manageable resource."
(c) Manageable resource = manageable entity (will be represented by WS-resource)
Dave: WSRF-Resource(*) defines a WS-Resource is a Web service
Hiro: It is tricky but OGSA does not define WS-Resource.
* the URL for WSRF-Resource: http://www.oasis-open.org/committees/download.php/9547/wsrf-WS- Resource-1.2-draft-01.doc
Thanks, ---- Hiro Kishimoto