Ilya, Concerning OGF PGI Use Cases : Thank you very much for your valuable comments on following EDGI Use Cases : Enforce Security of a Production Service Grid --------------------------------------------- http://forge.gridforum.org/sf/go/doc16010?nav=1 - An 'Activity' is a 'Unit of work which is submitted to a Service via an Endpoint' (GLUE 2.0) - You are right, what needs to be frozen is NOT the physical resources processing work of the malicious User, but the ongoing activities created locally for the malicious User. Prepare Desktop Grid Version of Application ------------------------------------------- http://forge.gridforum.org/sf/go/doc16028?nav=1 - 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 trust Users and PUSH activities, while Desktop Grids 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 statefull server performing syntactic translations, activity buffering, activity concatenation or expansion, activity wrapping, ..., which I summarize 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. Marshal Activities from Service Grid to Desktop Grid ---------------------------------------------------- http://forge.gridforum.org/sf/go/doc16022?nav=1 - Same answers as for the previous Use Case. I will add all above explanations and corrections, and take into account most of your corrections about English. I am going this night on vacation for 10 days, so updating the EDGI Use Cases will take a little time. Thank you again. Best regards. ----------------------------------------------------- Etienne URBAH LAL, Univ Paris-Sud, IN2P3/CNRS Bat 200 91898 ORSAY France Tel: +33 1 64 46 84 87 Skype: etienne.urbah Mob: +33 6 22 30 53 27 mailto:urbah@lal.in2p3.fr -----------------------------------------------------