RE: [Ecrit] Performance Requirement

["Brian Rosen" <br at brianrosen.net>]

Fair enough: 90%

Brian

-----Original Message-----
From: ecrit-bounces at ietf.org [mailto:ecrit-bounces at ietf.org] On Behalf Of
Drage, Keith (Keith)
Sent: Tuesday, August 02, 2005 11:05 AM
To: 'ECRIT'
Subject: RE: [Ecrit] Performance Requirement

Without wishing to get into the discussion of whether we should have a
specific value at all, I would note that the specification of a specific
value, without qualification of percentage of calls that should meet this
value, is utterly meaningless.

regards

Keith

Keith Drage
Lucent Technologies
drage at lucent.com
tel: +44 1793 776249


> -----Original Message-----
> From: ecrit-bounces at ietf.org 
> [mailto:ecrit-bounces at ietf.org]On Behalf Of
> Andrew Newton
> Sent: 02 August 2005 13:44
> To: Brian Rosen
> Cc: 'ECRIT'
> Subject: Re: [Ecrit] Performance Requirement
> 
> 
> 
> On Aug 2, 2005, at 8:18 AM, Brian Rosen wrote:
> 
> > Rohan suggested we remove the D5 requirement and replace it with a  
> > motivational section, since there was no requirement.  I think we  
> > should have a concrete goal, with a motivation for how we came to  
> > the goal.  I propose:
> >
> >
> >
> > The time required to map SHOULD be 500ms, assuming normal caching  
> > strategies in the mechanism work.  The maximum time SHOULD be 1  
> > second.
> >
> >
> >
> > Motivation: Total time from last digit pressed to ring at the PSAP  
> > should be two seconds.  Allocating one quarter of that to the  
> > mapping mechanism seems reasonable, and achievable if caching  
> > mechanisms work well enough for a single element to determine the  
> > mapping.
> I believe that if we continue applying 2119 language, then 
> specifying  
> it as a gaol or a requirement has no difference.  Also, the 
> mechanism  
> specifies caching.  Given we don't know what the requirements 
> are for  
> caching, we should avoid this language.
> 
> -andy
> 
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