+2

At 09:39 AM 7/24/2005 -0400, Tom Maguire wrote:

+1 Karl


Frey’s Law: “Every 5 years the number of architecture components double and
the ability to comprehend them halves”


Perfection is achieved, not when there is nothing more to add, but when
there is nothing left to take away.   ­ Antoine de Saint-Exupery

T o m   M a g u i r e


STSM, On Demand Architecture


Poughkeepsie, NY  12601


                                                                          
             Karl Czajkowski                                              
             <karlcz@univa.com                                            
             >                                                          To
             Sent by:                  Steven Newhouse                    
             owner-ogsa-bes-wg         <s.newhouse@omii.ac.uk>            
             @ggf.org                                                   cc
                                       ogsa-bes-wg@ggf.org                
                                                                   Subject
             07/24/2005 01:13          Re: [ogsa-bes-wg] Management       
             AM                        Functions in BES                   
                                                                          
                                                                          
                                                                          
                                                                          
                                                                          
                                                                          




On Jul 23, Steven Newhouse modulated:
> >Discussion: Sections 3.4, 3.5 & 3.6. Having 3 management operations in
> >the BES specification until generic OGSA management structure defined?
>
> The operations in 3.4 & 3.5 (Start & Stop AcceptingNewActivities) I see
> as being a service specific management function (i.e. they effectively
> alter the behavior of one specific operation within the service).
>

While its semantics references a BES operation, it seems to me that it
is a more general management pattern for any service that has a
stateful, factory-like interface: stop accepting/creating new work
items but continue processing the existing ones (whatever they are).
The BES-specific meaning could just as easily be specified by calling
out this work acceptance model so that it can be related to an
external management mechanism.

I think it is wrong to burden BES implementations with these kinds of
management functions that are specific to a hosting environment.  I
think the right path here is to engage in management standards for web
services and create profiles to compose these with a basic execution
service if you require both.

I cannot see these functions as being more important interop points
than any of the other security and policy management functions which
everyone seems to agree are out of scope.  If you must use localized
mechanisms to do practical management of a BES installation, I am not
sure what these functions buy you.


karl

--
Karl Czajkowski
karlcz@univa.com

_______________________________________________________________
Ian Foster                    www.mcs.anl.gov/~foster
Math & Computer Science Div.  Dept of Computer Science
Argonne National Laboratory   The University of Chicago   
Argonne, IL 60439, U.S.A.     Chicago, IL 60637, U.S.A.
Tel: 630 252 4619             Fax: 630 252 1997
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