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Context in practice

Context in practice. … and what’s new Lorentz center, Wednesday, 21 November 2006. Context. Handling large amounts of data Work together Work in a consistent way Experiment with source code Know what data and code was used Keep data private Make data public Throw away data. Projects.

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Context in practice

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  1. Context in practice … and what’s new Lorentz center, Wednesday, 21 November 2006

  2. Context • Handling large amounts of data • Work together • Work in a consistent way • Experiment with source code • Know what data and code was used • Keep data private • Make data public • Throw away data

  3. Projects • Organize in Projects, that have • A name and description • Users • Default privileges • Responsible - privileged – users • New objects are automatically part of the currently active context

  4. Privileges • User – Project – Astro-Wise … • MyDB • Project with same name as user • User-only objects within a project, i.e.user can see all data within a projectbut creates data that is invisible to others within a projectcontext.set_privileges_user_only()context.set_privileges_project_only()context.set_default_privileges()

  5. Migrating data • Migrating everything from MyDBawe dbmigrateall.py AWAUSER KIDS • Migrating a single object including its dependenciesfor sl in SourceList.name.like('*TEST*'): context.migrate(sl, 'VESUVIO')

  6. Deleting data • Deleting everything in MyDBawe dbdeleteall.py AWAUSER • Deleting a single object • Requires careful checking for ALL dependent objects • Is not yet possible • DBA’s run dbvacuum to delete files from dataservers that belong to deleted objects

  7. Project specific source code • Put project source code in separate CVS repositories • awe will use code that is specific to the currently selected project • Only code that is different needs to be kept in project specific CVS • Beware of unnecessary divergence!

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