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Job Options for Algorithms and Tools JOE v2.0

Job Options for Algorithms and Tools JOE v2.0. GANGA Software Workshop - 20-22 April 2004 - CERN Chun Lik Tan (Alvin) - Birmingham clat@hep.ph.bham.ac.uk. Agenda. Format of extracted information Persistency of job options. Format of extracted information. Background:

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Job Options for Algorithms and Tools JOE v2.0

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  1. Job Options forAlgorithms and ToolsJOE v2.0 • GANGA Software Workshop - 20-22 April 2004 - CERN • Chun Lik Tan (Alvin) - Birmingham • clat@hep.ph.bham.ac.uk

  2. Agenda • Format of extracted information • Persistency of job options

  3. Format of extracted information • Background: • Plex - This is the Python lexical analysis engine behind JOE’s job options parser.http://www.cosc.canterbury.ac.nz/~greg/python/Plex/ • JOE is capable of parsing both text-based and Python script-based job options files.

  4. Format of extracted information • Parser produces tokens which are recognised as algorithms, tools, services, properties, values, comments or included files. • The overall structure is essentially a multi-depth Python dictionary. The keys used are the objects of the tokens extracted.

  5. Format of extracted information • A job options file object (i.e. internal JOE representation) has three constituent member data structures: • the job option ‘tree’ dictionary, the included file objects list, and the comment objects list.

  6. Format of extracted information • Structure of job options ‘tree’ dictionary: • { Tool1:{Property1:{Property2:{’_value’:Value}}}, Tool2:{Property1:{’_value’:Value}}, Algorithm:{Property:{’_value’:Value}}, Service:{Property:{’_value’:Value}},} • The latter two member data structures are straight forward lists.

  7. Persistency of job options • JOE adopts a very pragmatic approach to job option persistency.... Save it in the same format it is capable of reading i.e. in text or Python. • Other formats e.g. Python pickle objects, XML representation can and will be supported when the need arises.

  8. Persistency of job options • To diff or not to diff... • Saving only changes imply having the original job options file at hand. • A particular job options file from different LHCb/ATLAS releases may/will differ slightly. Changes may be meaningless when applied to newer files. • Position sensitive changes?

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