[Nsi-wg] Immediate/Advance reservation (Re: NSI conf call minutes)

[Tomohiro Kudoh]

Hi all,

I proposed the guard time scheme since I understood there has been a
consensus of not to use 2PC or reservation confirmation in the WG.
Following such constraints, the guard-time is a simple way to mimic
immediate reservation. 

However, according to the discussion of the list and the last call, most
of people do not think it is acceptable, and I think we can re-consider
adoption of 2PC.

So, let me propose another choice of reservation operation as attached.

Tomohiro

On Wed, 07 Apr 2010 22:02:08 +0900
Tomohiro Kudoh <t.kudoh at aist.go.jp> wrote:

> Hi all,
> 
> To keep the v1.0 architecture simple, I propose to not to use the
> immediate reservation in v1.0. Instead, I propose to define guard time,
> and use it as follows:
> 
> - The "guard time" is: possible maximum time required to process a
> request and make resources ready for provisioning.
> 
> - Each provider NSA must define its guard time and provide it to
> requester NSAs. 
> 
> - A requester NSA should not request a reservation which start time is
> smaller (earlier) than (current time + guard time). Time required for
> message delivery should be taken into account too. 
> 
> - If a provider NSA receives a reservation request which start time is
> before (current time + guard time), it simply denies the request. 
> 
> If a requester wants resources to be provisioned as soon as possible, it
> can set the start time parameter in a advance request to:
> (current time + guard time + a certain time required for message
> delivery).
> 
> In this way, immediate provisioning can be requested by an advance
> reservation request.
> 
> Tomohiro
> 
> On Thu, 1 Apr 2010 14:54:15 +0100
> Guy Roberts <Guy.Roberts at dante.net> wrote:
> 
> > The minutes for yesterday's conference call are available here:
> > 
> > http://forge.gridforum.org/sf/go/doc15952?nav=1
> > 
> > Guy
> > ------------------------------------------------------------------------------------------------------------------
> > Guy  Roberts,  Ph.D
> > 
> > Network Engineering & Planning
> > DANTE - www.dante.net<http://www.dante.net/>
> > Tel: +44 (0)1223 371 316
> > City House, 126-130 Hills Road
> > Cambridge, CB2 1PQ, UK
> > ------------------------------------------------------------------------------------------------------------------
> > 
> > 
> > 
> 
> 
> 
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