[Pgi-wg] Job Management teleconference rescheduled on Friday 17 April

[Etienne URBAH]

Balazs,

Concerning Data Staging :


Readability of the 'Execution Service Strawman' document
--------------------------------------------------------
In the MS-Word version of this document, the numbers and titles of the
chapters about Data Staging do NOT correctly appear in the text.

That is why I did NOT refer to them in my mail dated 11 April 2009.

Now I have found the numbers and titles in the 'Table of Contents', and
it is much clearer.

Do not hesitate to upload files with OpenDocument format (such as ODT,
ODP, ...).  I have installed OpenOffice on my computer, and everybody
can download it freely from download.openoffice.org


Data Staging scenarios covered by the 'Execution Service Strawman'
------------------------------------------------------------------
In the 'Execution Service Strawman', I am afraid that stage-in (and
writing by the job) is implicitly assumed to have as destination a local
disk of the Computing Resource on which the Job is already present.

So, the 'Execution Service Strawman' document covers only following
scenarios :
-  Just In Time Staging in the COMPUTING Resource by the Execution
Service (3.5.b and 3.5.c),
-  Just In Time Staging in the COMPUTING Resource by the Client (3.5.a
and 3.5.d),
-  Staging by the Job running on the Computing Resource (3.5.e).


Data Staging scenarios NOT covered by the 'Execution Service Strawman'
----------------------------------------------------------------------
In fact, the destination of stage-in (and writing by the job) can also be :
-  a disk on a (possibly remote) grid Storage Resource (Stage-in from tape),
-  a disk on a close grid Storage Resource (Stage-in from tape or remote
Storage Resource, Writing by the job).

So, following scenarios are NOT covered by the 'Execution Service
Strawman' :
-  Pre and Post Staging by the Client  (EGEE standard scenario)
-  Pre and Post Staging in a STORAGE Resource by the Execution Service


I have added references to the 'Execution Service Strawman' document in
my renamed 'Data Staging - Concepts and Scenarios' document at
http://forge.gridforum.org/sf/go/doc15607?nav=1

I hope that it is clearer now, and I am available for any further
information and improvement.


Best regards.

----------------------------------
Etienne URBAH          IN2P3 - LAL
Bat 200     91898 ORSAY     France
Tel: +33 1 64 46 84 87
Mob: +33 6 22 30 53 27
Skype: etienne.urbah
mailto:urbah at lal.in2p3.fr
----------------------------------


On Wed, 15 Apr 2009, Balazs Konya wrote:
> hi,
> 
> Etienne URBAH wrote:
>> Moreno, Balazs, Morris and Johannes,
>>
>> Concerning the next Job Management teleconference rescheduled on 
>> Friday 17 April :
>>
>> -  In the agenda, could you add a review of the document 'Data Staging 
>> - Concepts and Use cases' (extracted from my mail dated 11 April 2009, 
>> with improvements) available at 
>> http://forge.gridforum.org/sf/go/doc15607?nav=1
> 
> i was wondering how does your data staging text relate to the 5 options 
> described under the data staging functionality within the GES strawman?
> 
> would have been nice if you could have somehow classified your data 
> staging scenarios along the strawman options.  Do you find any data 
> staging scenario not described by the 5 options in the strawman but 
> mentioned in your text?
> 
> cheers,
> Balazs
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