[occi-wg] Nouns and Verbs (was: Syntax of OCCI API)

Sam Johnston samj at samj.net
Fri Apr 17 04:45:16 CDT 2009

Ok so moving right along...

I like the "resource" approach (thanks Andy) and it fits well with the
single entry point w/ search style (which in turn allows for arbitrarily
simple and complex environments ranging from 1 to many millions of
resources). These have a category/type (e.g. server, network, storage) and
content depending on that. You can of course ask for just one type or
another (e.g. query "servers" but not networks or storage) and we can do a
simple optimisation to bring this into line with existing APIs:

http://example.com/servers -> http://example.com/-/server
http://example.com/networks -> http://example.com/-/network
http://example.com/storage -> http://example.com/-/storage

I specifically don't like the idea of differentiating between physical and
virtual resources (the whole point is that you can't, or at least don't need
to, know the difference), but that's ok because I don't think it's
necessary. If I'm dealing with a "server" I don't care if it's delivered as
a slice, a VM or a physical machine so long as it meets my service level
agreement.... this is details for the implementor and one of the areas where
we need to allow them to innovate.

Ok so nouns and verbs (ignoring CRUD which is common anyway):

 - start
 - stop
 - restart
 - deploy/undeploy? (comes back to persistent vs ephemeral etc.)
 - clone/snapshot?
 - start (aka up)
 - stop (aka down)
 - start (aka online)
 - stop (aka offline)
 - snapshot?
 - backup?


---------- Forwarded message ----------
From: Edmonds, AndrewX <andrewx.edmonds at intel.com>
Date: Fri, Apr 17, 2009 at 11:10 AM
Subject: Re: [occi-wg] Syntax of OCCI API
To: Andre Merzky <andre at merzky.net>, Chris Webb <chris.webb at elastichosts.com
Cc: "occi-wg at ogf.org" <occi-wg at ogf.org>

Exactly my point in my last mail, Andre.
If we can even begin to suggest on the nouns that'll be a big help. In the
wiki we have the central entity to be a "Resource" (in fact we could name
this as Noun to focus discussion - thoughts? Sam?. That "Resource"/"Noun"
can be abstractly sub-classed as virtual or physical and beneath that
concrete entities could be "Server", "VM" and in the case of extension (re:
Randy), "Loadbalancer".


-----Original Message-----
From: occi-wg-bounces at ogf.org [mailto:occi-wg-bounces at ogf.org] On Behalf Of
Andre Merzky
Sent: 17 April 2009 10:03
To: Chris Webb
Cc: occi-wg at ogf.org
Subject: Re: [occi-wg] Syntax of OCCI API

Once we get the noun/verb/attribute part settled, there is
no harm in doing an ini and a key/val binding.  In fact, a
translator would be trivial...

You can argue endlessly about the better format: there are
too many PROs and CONs for both of them to come to an
conclusive answer, IMHO.

My $0.02, Andre.
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