Hi James, James Casey wrote:

Hi Michel,

I'm reviewing the Unicore use cases and have some questions.

Great! :-)

* In UC2.1(import from users workstation) is the file always sent as part of the job submission? Is there a separate way to upload from a workstation (or indeed from a worker node) into the Xspace a Uspace for a job which isn't started yet?

The import from a worker node ("living", i.e. addressable from within a Usite) is actually covered by the export/import from a Xspace to the Uspace. UC2.1 indeed focuses on data wast^Hallocating physical file system space on the users workstation she's sitting in front of. As you can imagine, this is not the most common case; users typically have their data living somewhere remote which is addressable through a Usite. Hence the by far most common use case in UNICORE is that data is travelling from Usite to Usite. This is coverered in a different use case.

* When doing an export/import from a Xspace to Uspace within a site, is an actual physical copy done, or is this a logical operation?

This is up to the site's middleware (in UNICORE: NJS, Network Job Supervisor). When the NJS is incarnating such import/export description, it may decide to do a symbolic lin or hard link, or physically copy the data to the target location. This can vary from site to site, so that site A may incarnate the same import/export as a symbolic link, but site B may incarnate that same import/export as a physical copy. If you have any more questions, or if I actually managed to confuse you completely (I think so), please bug me on today's call. Cheers, Michel -- Michel <dot> Drescher <at> uk <dot> fujitsu <dot> com Fujitsu Laboratories of Europe +44 20 8606 4834