Standards » Architecture Area » PGI WG

Remove duplicated text and footnote.

This document was originally designed using a template adequate for Software Engineering.
It is formatted here using the currently OGSA-based official PGI template, which is adequate for dissemination and academic papers about Applications, but inadequate and misleading for software engineering of Grid Middleware.

Shorten description of the Bridge

Lot of thanks to Ilya SAVERCHENKO for his valuable comments. This Use Case is performed more easily if the Application already runs on the Service Grid, but this is NOT an absolute prerequisite. Service Grids (Federations of managed computing resources) trust Users and push Activities , while Desktop Grids (Loose opportunistic Grids using idle resources) trust Applications and pull Activities. So, there is no interoperability at all. Interoperation can be achieved only by using a Bridge specially designed for this purpose. This Bridge does not simply forward the Activities from one Grid to another Grid, but it is a stateful server performing syntactic translations, Activity buffering, Activity concatenation or expansion, Activity wrapping, ..., which is summarized here as 'marshaling'. Detailed description of this Bridge is outside the scope of the Use Case : Only the Bridge Manager needs to have a detailed knowledge of it. The other Actors only need to know that this Bridge exists, and trust it.

Lot of thanks to Tim for his valuable comments. I have taken into account most of them.

Tim Parkinson / Steve Crouch Review Comments

Extracted from the 'Marshal Activities from Service Grid to Desktop Grid' EDGI Use Case