[Pgi-wg] Supportive slides: Request routing idea addressed

[Moreno Marzolla]

Steven Newhouse wrote:
>> It provides more information about the 'Request routing' idea
> addressed
>> by UNICORE/ARC/gLite...
> 
> Since when is this a core requirement for dealing with batch submission
> to a site? Is this not out of scope? You are opening up a can of worms
> regarding complex workflows etc.

I do not think this is out of scope. In gLite, we already have CREAM 
which acts as a front-end to multiple batch queues, and the gLite WMS 
which acts as a front-end to multiple CEs. Submitting a job through 
"PGI-BES" to the gLite WMS will cause the job to be forwarded to tbe CE 
better matching the job requirements to be selected for execution, and 
the job being forwarded there. Even the current, "plain" BES defines the 
concept of "embedded resources", which in the CREAM-BES prototype we 
used to let users access specific batch queues. If we consider the 
"easy" problem of forwarding individual jobs without dependencies (no 
workflows) I cannot see major reasons not to address this problem.

Moreno.

-- 
Moreno Marzolla
INFN Sezione di Padova,    via Marzolo 8,   35131 PADOVA,  Italy
EMail: moreno.marzolla at pd.infn.it         Phone: +39 049 8277103
WWW  : http://www.dsi.unive.it/~marzolla  Fax  : +39 049 8756233